Without more information about the specific characteristics and appearance of the small creatures that Shilpa found, it is difficult to determine exactly what they are.
However, there are many different types of small aquatic animals that can be found in fresh water, including insects, crustaceans, and mollusks. Some examples of small aquatic creatures that are commonly found in fresh water include:
Aquatic insects: Mayflies, stoneflies, caddisflies, and dragonflies are examples of aquatic insects that can be found in freshwater. These insects typically have a complete metamorphosis, where they go through four distinct stages in their life cycle: egg, larva, pupa, and adult.
Crustaceans: Freshwater crustaceans include crayfish, freshwater shrimp, and freshwater crabs. These animals have a complete metamorphosis, where they go through a series of stages in their life cycle, including a planktonic stage, megalopa stage, and juvenile stage before reaching adulthood.
Mollusks: Freshwater snails, freshwater mussels, and freshwater clams are examples of mollusks that can be found in freshwater. These animals typically have a complete metamorphosis, where they go through different stages in their life cycle, including a planktonic stage, a glochidium stage, and a juvenile stage before reaching adulthood.
It is important to note that without more information about the specific characteristics of the creatures that Shilpa found, it is impossible to determine their exact species and if they show complete or incomplete metamorphosis in their life cycle.
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after a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)?
Answer:
know what the substance is! All you need is the units of working strength and the volume of the solution. When a charged ball is far away from a rod, the charge on the rod is arranged in such a way that it is equal to the charge of the ball. This means that if the ball is positively charged, the rod will also be positively charged. The same applies if the ball is negatively charged. An analogy that can help to understand this concept is a magnet. When two magnets are placed close to each other, the poles of the magnets will either attract or repel each other depending on the type of poles. The same applies to the rod and the charged ball. If the ball is positively charged, it will attract the rod, and if the ball is negatively charged, it will repel the rod. Fun Fact: The electric field surrounding a charged object is called an electrostatic field. It is an invisible field that is created by the object's charge and affects other objects that are nearby.
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the energy change in a system is related to the amount of heat transferred and work done. if there is no heat transferred, what is the magnitude of work in a system equal to?
If there is no heat transferred, the magnitude of work in a system is equal to the change in the internal energy of the system.
If there is no heat transferred, the magnitude of work in a system is equal to the change in the internal energy (ΔU) of the system.
In thermodynamics, the internal energy of a system is the energy that is associated with the random molecular motion of the system. When work is done on or by a system, the internal energy of the system will change.
In the case where no heat is transferred, the first law of thermodynamics states that the change in internal energy (ΔU) of the system is equal to the work done on the system (W):
ΔU = W
So if there is no heat transferred, the magnitude of work in a system is equal to the change in the internal energy of the system.
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the rotating armature of an ac generator is connected to its external circuit through ? while a dc generator uses a(n) ? to make the connection.
With the help of slip rings, an AC generator connects the rotating armature to its external circuit.
A slip ring is an electronic device that permits the transfer of electrical currents and energy from a still structure to a spinning one. Any electrical device that needs to rotate while sending energy or currents can employ a slip ring.
A device that generates electrical energy from mechanical energy is an AC generator. Mechanical energy is provided by steam turbines, gas turbines, and combustion engines as the AC generator's input source. Alternating electrical power in the form of current and voltage is the output.
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a ball is thrown upward. what is its time interval between the release of the ball and the time it reaches its maximum height?
The upward throw of a ball. The gravity acceleration is 9.8 m/s2, and its combination 1 speed is 10.8 m/s. So, 1.10 seconds pass between the ball's release and the moment it reaches its highest point.
What happens to the ball's speed when it is launched upward and returns to the spot from which it was hurled?Gravity's acceleration is constantly downward and constant, however the speed and direction of the acceleration vary. The speed of the ball is zero at its top portion in its trajectory, then it picks up speed again as it descends toward.
Why does an object being hurled upward have a zero final velocity?Because the acceleration caused by the gravitational force is operating constantly downward at the greatest point when a body was thrown vertically upwards, only that point's velocity is zero. As a result, the velocity is zero due to the acceleration.
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a test ton used on a radio has a frequency of 1000 hz. what is the wavelength of this sound in air at normal room temperature
Explanation:
"Outlier" data can shift a Normal Bell Curve ____.
A. to get a large peak
B. to flatten out
C. to the left or right
D. up at both ends
A 6.0-ohm lamp requires 0.25 ampere of current to operate. In which circuit below would the lamp operate correctly when switch S is closed
It would only operate in C. In A and D, closing the switch would introduce a pathway of zero resistance.
In which circuit below would the lamp operate correctly when switch S is closed?
A switch has two states Open or closed When a switch is open no current can flow through it. When a switch is closed current flows through it.Electric current flows only if the circuit is closed. That is why we have switches at home. We call them key in circuit diagrams. When the key is not closed, the current does not flow through the circuit.When the switch is closed the current suddenly increased in circuit which produced a magnetic field and which caused deflection in the galvanometer. But when it is kept closed, the flow of current becomes constant so there will be no magnetic field and hence the pointer will return to zero.To learn more about ohm refers to:
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two charges, one 2nc and the other -2nc forming a horizontal dipole, are separated by 1.5 cm. a) calculate the magnitude and direction of the electric field at a vertical distance of 1m from the center of the dipole (0,1m)
The magnitude of the electric field at a distance of 1 m is 7.33 x 10^7 N/C and direction of the electric field is from the positive charge to the negative charge.
The magnitude of the electric field at a distance of 1 m from the center of the dipole is given by:
E = k(2q)/r^2
where k is the Coulomb constant (8.99 x 10^9 Nm^2/C^2), q is the charge of each charge (2nc and -2nc), and r is the distance between the charges (1.5 cm).
E = (8.99 x 10^9 Nm^2/C^2)(2 x 2nc)/(0.015 m)^2
E = 7.33 x 10^7 N/C
The direction of the electric field is from the positive charge to the negative charge.
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you are traveling by plane and reach cruising altitude, where the pilot says you are going 450.0 km/hr. you turn your laptop back on, and it takes 27.00 seconds to start up. how far have you traveled in this time?
You have travelled 3.375 km in the time it took for the laptop to start up.
What is distance travelled?Distance travelled is the total amount of distance that a person, vehicle, or object has traveled from one place to another. It is usually measured in miles, kilometers, or other units of measurement. Distance traveled is an important factor when calculating time, speed, or cost.
To calculate how far you have traveled in 27 seconds, we must first calculate the distance traveled in one second. To do that, we need to divide the speed (450.0 km/hr) by 3600, which is the number of seconds in an hour.
450.0 km/hr / 3600 = 0.125 km/s
Now that we know the distance traveled in one second, we can multiply it by the number of seconds it took for the laptop to start up (27.00 seconds).
0.125 km/s x 27.00 seconds = 3.375 km
Therefore, you have traveled 3.375 km in the time it took for the laptop to start up.
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the rate of change of the downward velocity of a falling object is the acceleration of gravity (10 meters/sec^2) minus the acceleration due to air resistance. suppose that the acceleration due to air resistance is 0.2 inverse seconds times the downward velocity. write the initial value problem and the solution for the downward velocity for an object that is dropped (not thrown) from a great height.
Assume that the downhill velocity is multiplied by 0.25 inverse seconds to get the acceleration caused by air resistance. Describe the initial value issue and its resolution.
How well does air resistance impact the rate at which items fall?Because air resistance slows down the motion of the falling object, it impacts acceleration during a fall to a lesser extent than gravity (g). The object's surface area and speed both influence the amount it slows down.
What are the issue and solution with initial value?A initial and boundary problem (IVP) in multivariable calculus consists of a normal differential equation and an initial condition that specify exact amount of the unknown variable at a specific location in the domain. In physics or even other sciences, modeling a system typically entails resolving an initial value dilemma.
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A box is attached to the ceiling and the wall with two ropes. The force of tension in the top rope is T1=√3 N and the force of tension in the side rope is T2=1 N. If the box has a mass of m=2kg, what force FA do you have to apply to break the ropes and accelerate the box with a=1 m/s2?
So the force you have to apply to break the ropes and accelerate the box with a=1 m/s^2 is 2 + √3 + 1 N
Calculating the problem:To determine the force FA that must be applied to break the ropes and accelerate the box with a=1 m/s^2, you can use the equation of motion:
F = ma
where F is the net force acting on the box, m is the mass of the box, and a is the acceleration of the box.
We know that the net force acting on the box is equal to the force applied to it minus the forces of tension in the top and side ropes.
So, F = FA - T1 - T2
and the acceleration of the box is 1 m/s^2
Given that,
FA = m×a + T1 + T2
Substitute the given values for m, a, T1 and T2,
FA = 2 kg × 1 m/s² + √3 N + 1 N
FA = 2 kg × 1 m/s² + √3 N + 1 N
= 2 + √3 + 1 N
What is movement?An object's movement or shift in position in relation to its surroundings over time is referred to as the motion. A subfield of physics that deals with the behavior of physical systems and objects is mechanics, the study of motion.
There are various kinds of motion, such as:
Motion in a line:This is straight-line motion. The linear velocity and acceleration of an object are calculated using the distance and time it takes to travel in a particular direction.
Motion by rotation:An axis is in motion here. When describing an object's rotational motion, the terms "angular displacement," "angular velocity," and "angular acceleration" are utilized.
Rhythmic oscillation: This is a motion that happens over and over again and revolves around a central point. It's called oscillation. A pendulum that swings or a guitar string that vibrates are two examples.
Motion of a projectile: This is the movement of an object that is projected into the air, like a ball that is thrown into the air or a gunshot.
Relational movement: This is how an object moves in relation to a reference point, like how a car moves on a road in relation to the earth.
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What is the magnitude of the force F on the 1.0 nC charge in the figure ?
The magnitude of the force F on the 1.0 nC charge in the figure is the positive charge and force F is 8 x 10^9 N (8 Giga Newtons).
The force F on the 1.0 nC charge in the figure can be calculated using Coulomb's law, which states that the force between two point charges is proportional to the inversely proportional to the square of the distance between the charges and a product of the charges. The magnitude of the force can be calculated using the following formula:
|F| = k x |q1| x |q2| / r^2
where k is the Coulomb constant (9 x 10^9 Nm^2/C^2), q1 and q2 are the charges (in Coulombs), and r is the distance between the charges (in meters).
In this case, q1 = 1.0 nC = 1.0 x 10^-9 C and q2 = -1.0 nC = -1.0 x 10^-9 C (since the charges are opposite and the force is attractive) and r = 0.1 m.
So, the magnitude of the force F can be calculated as:
|F| = k x |q1| x |q2| / r^2 = (9 x 10^9 Nm^2/C^2) x (1.0 x 10^-9 C) x (-1.0 x 10^-9 C) / (0.1 m)^2 = 8 x 10^9 N
The magnitude of the force F is 8 x 10^9 N (8 Giga Newtons)
It's important to note that the direction of the force is from the positive charge.
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sue is photographing some very small and intricate succulents growing in her backyard. she wants to capture as much detail as possible. what kind of lens would be best to use in this situation?
In this case, a macro lens would've been ideal. In her backyard, Sue is taking pictures of some incredibly tiny and complex succulents. She aims to record as many specifics as she can.
What does the lens do?A lens is a transparent piece of glass that, when light rays pass through it by refraction, either concentrates or disperses them. Lenses are employed in telescopes as well as other magnifying equipment because of their enlarging capabilities.
How do lenses function?Refraction is the process by which a lens changes the path of sun beams as the pass thru it. It follows that objects viewed through a lens appear to be either larger or less then they actually are because the rays appear to originate from a location that is closer or further distant of where they actually do.
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5. Based on your experiences with damping in the simulation, how do you think you could damp a sound wave?
Sound waves between layers of mass are dampened or diminished using MLV (Mass Loaded Vinyl).
By converting sound waves into heat through the use of a viscoelastic damping compound or MLV, the waves are weakened before they reach the next layer of mass.
Sound can only be stopped by mass. A mass can be made of plywood, drywall, or concrete.
The typical model for wave damping includes a velocity dependent term.
The damping increases when you try to distort the medium more quickly. The amount of damping is significantly influenced by the fluid's viscosity, through which the sound wave is propagating.
Only the bass portion of music is audible when heard from a distance because higher frequency sound dampens in air more quickly.
How does wave damping work?The wave's amplitude decreases with increasing displacement due to the decrease in energy per unit volume. However, when the wave's energy is dispersed over a huge region, causing it to decay rapidly, a different sort of damping (decrease in energy per unit volume) can be seen.
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If you were paddling up stream in a canoe at 2 m/min and the river is flowing at 1.5 m/ min? What is your net or final velocity?(This is a vector problem)
As you were paddling upstream, your net or final velocity is 0.5 m/s.
What is velocity?The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
The magnitude of velocity of river flowing: u = 1.5 m/min.
The magnitude of velocity of your canoe: v = 2 m/min.
As you were paddling upstream, that is, in opposite to the flow, your net or final velocity is = v - u
= 2 m/min - 1.5 m/min
= 0.5 m/min.
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The half-life of francium-223 is 20 minutes. If a sample originally contains 10 g of the isotope, how much remains after an hour? Please help me!! FAST!
(20 points)
The amount of the mass of the radioactive isotope remaining after 1 hour is 1.25 g.
What is the mass of the sample remaining after an hour?The mass of the sample remaining after an hour is calculated from the half life of the isotope as shown below.
The half life of the radioactive isotope = 10 minutes
The amount of the mass of the radioactive isotope remaining after 1 hour is calculated as follows;
1 hour = 60 minutes
0 half life ---------------------------> 10 g
20 minutes ------------------------> 5 g
40 minutes -----------------------> 2.5 g
60 minutes -----------------------> 1.25 g
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kat and andrew are trying to move a desk kat is pulling with a force of 15N and andrew is pulling with a force of 18N north draw a picture for this situation using vectors and then determine the resultant magnitude and direction
The concept of net force is important in understanding the relationship between the force experienced by an object and its resultant magnitude.
What is magnitude?The magnitude of the result (R) can now be determined using the Pythagorean theorem. The direction of the resultant force can be determined by finding the angle it makes with the north-south or east-west vector.To draw the resulting vector, connect the end of the first vector to the beginning of her second vector and place an arrow. To determine magnitude, measure the length of the resulting R, and to find its orientation, measure its angle with the x-axis.The magnitude |r| of the resulting vector is given by |r|=√(∑xi)2+(∑yi)2 | We found | = ( ∑ x i ) 2 + ( ∑ y i ) 2 , where ∑xi ∑ x i is the sum of the x components of each individual vector and ∑yi ∑ y i is the sum of the y components of each individual vector .To learn more about magnitude from the given link:
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which region includes the lowest pressures and highest temperatures at which the phase of x is known?
The region with the lowest pressures and highest temperatures at which the phase of x is known is the supercritical region.
This region is between the critical temperature and pressure, and is characterized by a single phase that is neither liquid nor gas, but rather a combination of the two.
This region exhibits properties that are intermediate between those of a liquid and a gas, and so the phase of X is known here.
A fluid is referred to as "supercritical" when it is subjected to pressure and temperature above the compound's critical point. The fluid exhibits specific characteristics and behaves in a manner that is in between that of a liquid and a gas in the supercritical region.
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2. What is the potential energy of a 3 kg ball that is on the ground?
The potential energy of a 3 kg ball that is on the ground is zero.
What is the potential energy of a ball on the ground?Zero ,It will have no kinetic energy since it is not moving, and because it is laying on the ground, it will also have no potential energy. This is equivalent to the ground's zero potential energy.energy potential = massHeight, 9.8 m/s of gravity3 kilogrammes is the size of you. I think you need to increase this by 9.8 and then convert this to grammes (3000g). Since the ball is on the ground and you are at zero height, your potential energy is also zero.A 3 kilogramme body on a planet's surface has 54 joules of potential energy.To learn more about potential energy refer to:
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astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it. astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them. for example, observations indicate that gas clouds in galaxy m87 are whirling unusually fast about the galaxy's center. most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl. a few skeptics have argued that the concentration of mass necessary to explain the speed of the whirling gas is not necessarily a black hole: the concentration in m87 might be a cluster of a billion or so dim stars. the same hypothesis might have been applied to the galaxy ngc 4258, but the notion of such a cluster's existing in ngc 4258 was severely undermined when astronomers measured the speed of a ring of dust and gas rotating close to the galaxy's center. from its speed, they calculated that the core's density is more than 40 times the density estimated for any other galaxy. if the center of ngc 4258 were a star cluster, the stars would be so closely spaced that collisions between individual stars would have long ago torn the cluster apart. question the passage is primarily concerned with
The passage is primarily concerned with explaining how astronomers infer the existence of black holes.
What is astronomers?Astronomers are scientists who study the universe, its components, and the laws that govern it. They use a variety of tools and techniques to observe and analyze astronomical phenomena. Astronomers use telescopes to observe distant objects in the sky, such as stars, galaxies, and planets. They also use spectroscopy to measure the composition of celestial bodies and study their motion through space. Astronomers also use computers to simulate astronomical events and create models of the universe. Additionally, they often collaborate with other scientists in fields such as physics, chemistry, mathematics, and engineering to better understand the universe. Astronomy is an ever-evolving field that continues to provide new insights into our understanding of the cosmos.
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electromagnetic waves transfer ____ from one ____ to ____ ?
Answer:
electromagnetic waves transfer energy from one place to another.
Explanation:
direction cosines tell the angle between the force vector and each of the coordinate axes. select one: true false
The given statement about “direction cosines tell the angle between the force vector and each of the coordinate axes” is true.
Analytical geometry defines the directional cosines of a vector as the cosines of the angles formed by the vector with the three coordinate axes. To calculate the cosine of a vector's direction, divide the relevant coordinate by the vector's length. A direction's cosine is equivalent to a unit vector's x-coordinate. One such property of the direction cosine is that the sum of the squares of all the direction cosines equals one. The cosine of the angle subtended by a line having three coordinate axes, such as the x-axis, y-axis, and z-axis, is known to be the direction cosine. The direction cosines are cos α, cos β, and cos γ if the angles subtended by these three axes α, β, and γ.
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you and your friend are running at each other from 200.0 m apart. after 10.0 seconds and having passed the 50.0 m mark on your side, you see your friend has already gone 60.0 m on his. what will your average velocity need to be for the remaining time in order for you to both have covered the same amount of total distance, assuming he maintains a constant speed?
My average velocity should be 7.5 m/sec.
Speed = [tex]\frac{distance covered }{time taken}[/tex]
Average speed = [tex]\frac{total distance}{total time}[/tex]
my friend has covered 60 m in 10s
Speed of friend =[tex]\frac{60}{10}[/tex]
= 6m/s
Friend will cover final 40 m in
[tex]\frac{40}{6}[/tex]=6.67 s
So, I need to cover final 50 m in 6.67 s
my average speed= [tex]\frac{50}{6.67}[/tex]
=7.5 m/s
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a girl lays on the edge of a cliff and looks down at the water below. wondering how far the drop is, she drops a pebble over the edge and counts 1.37 s from the time that she releases the pebble (from rest) to when it strikes the water. how far below the cliff is the surface of the water?
The pebble was traveling at 13.44 m/s when it impacted the water.
The speed at which something moves in a specific direction is known as its velocity. as the speed of a car driving north on a highway or the pace at which a rocket takes off.
A cliff is a group of rocks that rises nearly vertically, or straight up and down, from the ground. Cliffs are a frequent component in landscapes. Sea cliffs are one type that can occur around the coast, high in the mountains, or as the walls of canyons and valleys.
t = Time taken = 1.37 s
u = Initial velocity
v = Final velocity
s = Displacement
a = Gravitational acceleration is 9.81 m/s2 (downward direction is taken as positive)
Equation of motion
v = u + at
v = 0 + 9.81 × 1.37
v = 0 + 13.4397
v = 13.44 m/s
When the stone impacted the water, its speed was 13.44 m/s.
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Elastic and (for our purposes) Nearly Elastic Collisions:
Select all that apply
conserve the momentum of each object
conserve the total kinetic energy of the system
conserve the total momenta of the system
conserve the kinetic energy of each object
For elastic collision and nearly elastic Collisions: conserve the total kinetic energy of the system and conserve the total momenta of the system.
option B and C.
What is law of conservation of linear momentum?The law of conservation of linear momentum states that in an isolated system during elastic or inelastic collision the sum of the initial momentum of the system is equal to the sum of the final momentum of the system.
An elastic collision is a type of collision in which the two objects move with a different velocities after the collision.
In elastic collision both momentum and kinetic energy is conserved unlike the inelastic collision where only momentum is conserved and the kinetic energy of the system is not conserved.
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the airplane travels with constant velocity. a piece of its cargo falls out of an open door. which curve best describes the motion of the piece of cargo?
The curve of a parabolic path best captures the motion of the piece of cargo.
The parcel moves in a parabolic path, always remaining underneath the aircraft. As the package falls, it encounters a vertical acceleration that alters its vertical velocity. The downward force of gravity on the package is what is causing this vertical acceleration.
If the package's velocity could be roughly compared to projectile motion, then there would be no horizontal acceleration (that is, if the impact of air resistance could be assumed to be insignificant). In the absence of horizontal forces, there would be a constant horizontal velocity. This explains why the package was dropped beneath the plane, as it were.
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A calorimeter contains 1. 25 kg of water at 21. 5°C. A 0. 15-kg block of an unknown substance at 65. 5°C is placed in the water. The final temperature of the system is 22. 0°C. What is the specific heat of the substance? What could the substance be?
The specific heat of the substance is 0.99 J/g°C and it could be aluminum or copper.
What is the final temperature of the system after the unknown substance is placed in the water?The final temperature of the system after the unknown substance is placed in the water is 22.0°C. This can be determined by using the formula Q = mcΔT, where Q is the heat transferred, m is the mass of the substance, c is the specific heat, and ΔT is the change in temperature. In this case, the heat transferred from the unknown substance to the water results in a temperature increase of only 0.5°C, indicating a relatively low specific heat value for the unknown substance.
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radiant energy is also called(1 point) responses thermal energy. thermal energy. light energy. light energy. chemical energy. chemical energy. cellular energy.
Radiant energy is also called responses thermal energy (b) light energy is correct option.
Radiant energy in physics refers to the energy of electromagnetic and gravitational radiation. Radiant energy is particularly studied via radiometry. Its SI unit for energy is the joule (J). Other than radiometry, electromagnetic energy is denoted by the letters E or W. The phrase is specifically used when electromagnetic radiation is released into the environment by a source. For the human eye, this radiation might be visible or invisible.
Energy included in electromagnetic waves is known as radiant energy. These consist of microwaves, infrared, radio waves, ultraviolet light, and visible light. The random molecular movements of substances store thermal energy, often known as heat energy.
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the acceleration of gravity on the surface of mars at the equator is 3.699 m/s2. how long does it take for a rock dropped from a height of 1.099 m to hit the surface?
It takes total time of 74 seconds for a rock dropped from a height of 1.099 m to hit the surface.
That planet's gravitational acceleration is 3.699 meters per second squared. The height from which the object was dropped takes 0.8198 seconds to reach the surface. Because the initial velocity is zero,
H = Ut + 1/2 a[tex]t^{2}[/tex] Because u = 0, this is half multiplied by 3.699 multiplied by [tex]0.8198^{2}[/tex] divided the.81988198 right divide by 2. This gives us an estimate of 1.25 meters.
When the rock is launched upwards, it begins to decelerate immediately due to the opposing force of gravity. The rock will have reached its highest point and will then fall back down when the velocity on the ascent reaches zero.
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for a chipmunk to collect food, it has to find an acorn, put it in its mouth, run to the hole, and put the acorn in the hole. the chipmunk would like to collect twenty acorns. repeating the loop to collect an acorn is called
The chipmunk would like to collect twenty acorns. repeating the loop to collect an acorn is called foraging.
What is loop?Looping is a programming technique that allows a set of instructions to be repeated until a specific condition is met. It is used to execute a set of statements multiple times based on a condition. Loops are used to perform repetitive tasks such as iterating over an array or a collection. They are also used to perform an action on each element in a collection of data. A loop can execute a block of code as long as the specified condition is true. There are two main types of loops: condition-controlled loops and count-controlled loops. Condition-controlled loops execute a set of instructions while a certain condition is true, while count-controlled loops execute a set of instructions a certain number of times. Loops are essential to programming as they allow us to automate repetitive tasks, which can make programs more efficient and easier to maintain.
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what must the charge (sign and magnitude) of a particle of mass 1.50 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 670 n/c ?
The force acting on a negative charge is in opposition to the direction of the electric field [tex]-2.194 \times 10^{-5}[/tex].
In order for a charge to stay stationary, a weight must be balanced by an electric force that acts in the opposite direction as the weight, with the electric force acting upward.
In a directed electric field, the electric charge particles are subject to a force that is directed in that direction. It can be caused by a charge imbalance, which is when there are more positively charged particles than negatively charged particles in a certain region.
A particle of mass 1.50 g
A downward-directed electric field of magnitude 670 n/c
qE=mg
q=mg/E
Substitute the value in above equation we get,
[tex]& =\frac{1.50 \times 10^{-3} \times 9.8}{670} \\& =-2.194 \times 10^{-5} \mathrm{C}[/tex]
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