Answer:
The first major distinction is between the pelagic and benthic zones. The pelagic zone refers to the water column, where swimming and floating organisms live. The benthic zone refers to the bottom, and organisms living on and in the bottom are known as the benthos.
Explanation:
Calculate the magnetic force of 10C charged particle which is moving with a velocity of 2m/s in an magnetic field of 0.5T? The direction of magnetic field is same as that of path of the second particle.
Answer:
i think it is 20.5
Explanation:
A couple is sitting side-by-side. By what factor should the distance between them be changed by if the attractive force is to be halved?
Answer:
the distance should be changed by a factor of √2
Explanation:
The attractive force between the couples can be given by Newton's Law of Gravitation:
[tex]F =\frac{Gm_1m_2}{r^2}[/tex]
where,
F = Attractive Force
G = Universal Gravitational Constant
m₁ = mass of the first person
m₂ = mass of the second person
r = distance between them
Now, if we want to halve the force without changing masses, hen:
[tex]F' = \frac{1}{2} F = \frac{1}{2} \frac{Gm_1m_2}{r^2}\\\\F' = \frac{1}{2} F = \frac{Gm_1m_2}{(\sqrt{2}r)^2}[/tex]
Hence, it is clear that the distance should be changed by a factor of √2
Why do power plants worry about the resistance of the wires?
( PHYSICAL SCIENCE )
Answer:
Resistors restrict current flow through a circuit.
(The electrons don't easily get from one side to the other)
High voltage is actually needed for to send power over long distances because if you use high current, a lot of the power is lost to the resistance in the wires.
Explanation:
hope it helps <3
5. A new type of hoverboard has been designed to levitate over a copper surface. The
developers had a skateboard icon test out the hoverboard on a copper halfpipe.
What type of field is responsible for levitating the hoverboard and rider as it
traverses the half pipe?
Answer:
Explanation:
I think its gravitational
The magnetic field is responsible for levitating the hoverboard and rider as it traverses the half pipe.
What is a magnetic field?The magnetic field is defined as the field the magnetic materials generate or when an electric charge moves in a field region that generates the magnetic field.
We have:
The surface is made up of from the copper and copper is conductor of electricity.
When an electrical charge moves, it generates a magnetic field. As with electrical current running via a wire, the spinning and orbiting of an atom's nucleus produces a magnetic field.
Thus, the magnetic field is responsible for levitating the hoverboard and rider as it traverses the half pipe.
Learn more about the magnetic field here:
brainly.com/question/14848188
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A hunter shoots a 500 g arrow at a 2.0 kg bird perched on a tall tree growing on flat, level ground. The arrow is launched from ground level with a speed of 40 m/s at an angle of 30 degrees above the horizon. It is traveling horizontally when it strikes and embeds in the bird. How far from the base of the tree do the bird and the arrow land
Answer:
The bird and the arrow are 84.621 meters far from the hunter.
Explanation:
The arrow experiments of a parabolic motion, which is the combination of horizontal motion at constant velocity and vertical uniform accelerated motion. The arrow strikes the bird when it reaches its maximum height. First, we determined the time taken by the arrow before striking the bird:
[tex]v = v_{o}\cdot \sin \theta + g\cdot t[/tex] (1)
Where:
[tex]v_{o}[/tex] - Initial speed of the arrow, in meters per second.
[tex]v[/tex] - Final speed of the arrow, in meters per second.
[tex]\theta[/tex] - Launch angle, in sexagesimal degrees.
[tex]g[/tex] - Gravitational acceleration, in meters per square second.
[tex]t[/tex] - Time, in seconds.
If we know that [tex]v_{o} = 40\,\frac{m}{s}[/tex], [tex]\theta = 30^{\circ}[/tex], [tex]g = -9.807\,\frac{m}{s^{2}}[/tex], [tex]v = 0\,\frac{m}{s}[/tex], then the time taken by the arrow is:
[tex]t = \frac{v-v_{o}\cdot \sin \theta}{g}[/tex]
[tex]t = \frac{0\,\frac{m}{s}-\left(40\,\frac{m}{s}\right)\cdot \sin 30^{\circ} }{-9.807\,\frac{m}{s^{2}} }[/tex]
[tex]t = 2.039\,s[/tex]
And the initial horizontal distance of the arrow ([tex]x_{i}[/tex]) is determined by this kinematic formula:
[tex]x_{i} = (v_{o}\cdot \cos \theta)\cdot t[/tex] (2)
If we know that [tex]v_{o} = 40\,\frac{m}{s}[/tex], [tex]\theta = 30^{\circ}[/tex] and [tex]t = 2.039\,s[/tex], then the initial horizontal distance is:
[tex]x_{i} = \left[\left(40\,\frac{m}{s} \right)\cdot \cos 30^{\circ}\right]\cdot (2.039\,s)[/tex]
[tex]x_{i} = 70.633\,m[/tex]
There is an inelastic collision between the arrow and the bird, the initial velocity of the bird-arrow system is:
[tex]v = \frac{m_{A}\cdot v_{o}\cdot \cos \theta}{m_{A}+m_{B}}[/tex] (3)
Where:
[tex]v[/tex] - Initial velocity of the bird-arrow system, in meters per second.
[tex]m_{A}[/tex] - Mass of the arrow, in kilograms.
[tex]m_{B}[/tex] - Mass of the bird, in kilograms.
If we know that [tex]m_{A} = 0.5\,kg[/tex], [tex]m_{B} = 2\,kg[/tex], [tex]v_{o} = 40\,\frac{m}{s}[/tex] and [tex]\theta = 30^{\circ}[/tex], then the initial velocity of the bird-arrow system is:
[tex]v = \frac{(0.5\,kg)\cdot \left(40\,\frac{m}{s} \right)\cdot \cos 30^{\circ}}{0.5\,kg + 2\,kg}[/tex]
[tex]v = 6.928\,\frac{m}{s}[/tex]
And the maximum height reached by the arrow ([tex]y[/tex]), in meters, is:
[tex]y = y_{o} + (v_{o}\cdot \sin \theta)\cdot t +\frac{1}{2}\cdot g\cdot t^{2}[/tex] (4)
Where [tex]y_{o}[/tex] is the initial height of the arrow, in meters.
If we know that [tex]y_{o} = 0\,m[/tex], [tex]v_{o} = 40\,\frac{m}{s}[/tex], [tex]\theta = 30^{\circ}[/tex], [tex]g = -9.807\,\frac{m}{s^{2}}[/tex] and [tex]t = 2.039\,s[/tex], then the maximum height reached by the arrow is:
[tex]y = 0\,m + \left(40\,\frac{m}{s} \right)\cdot (2.039\,s)\cdot \sin 30^{\circ} +\frac{1}{2}\cdot \left(-9.807\,\frac{m}{s^{2}}\right)\cdot (2.039\,s)^{2}[/tex]
[tex]y = 20.394\,m[/tex]
Time needed by the bird-arrow system to land is determined by this expression based on (4):
[tex]y = y_{o} + (v_{o,y})\cdot t +\frac{1}{2}\cdot g\cdot t^{2}[/tex]
If we know that [tex]y_{o} = 20.394\,m[/tex], [tex]y = 0\,m[/tex], [tex]v_{o,y} = 0\,\frac{m}{s}[/tex] and [tex]g = -9.807\,\frac{m}{s^{2}}[/tex], then the time needed to land is:
[tex]0\,m = 20\,m + \left(0\,\frac{m}{s} \right)\cdot t + \frac{1}{2}\cdot \left(-9.807\,\frac{m}{s^{2}} \right)\cdot t^{2}[/tex]
[tex]t = 2.019\,s[/tex]
And the horizontal distance travelled by the bird-arrow system ([tex]x_{ii}[/tex]), in meters, is calculated from a formula based on (2):
[tex]x_{ii} = v_{o, x}\cdot t[/tex]
If we know that [tex]v_{o,x} = 6.928\,\frac{m}{s}[/tex] and [tex]t = 2.019\,s[/tex], then the distance travelled by the bird-arrow system is:
[tex]x_{ii} = \left(6.928\,\frac{m}{s} \right)\cdot (2.019\,s)[/tex]
[tex]x_{ii} = 13.988\,m[/tex]
The final distance of the bird-arrow system from the hunter is:
[tex]x = x_{i} + x_{ii}[/tex]
[tex]x = 70.633\,m + 13.988\,m[/tex]
[tex]x = 84.621\,m[/tex]
The bird and the arrow are 84.621 meters far from the hunter.
What is SI unit of energy?
Answer:
the SI unir of enery is joule
which of the following could be a good of electricity
Answer:
there is no picture to see
What will be the change in "velocity" of a 991 kg car if a force of 31,770 N is applied to it for 0.4 seconds?
Answer: [tex]12.82\ m/s[/tex]
Explanation:
Given
Mass of car [tex]m=991\ kg[/tex]
Force applied [tex]F=31,770\ N[/tex]
time period [tex]t=0.4\ s[/tex]
Acceleration associated with car
[tex]\Rightarrow a=\dfrac{F}{m}\\\\\Rightarrow a=\dfrac{31770}{991}\\\\\Rightarrow a=32.05\ m/s^2[/tex]
Acceleration is the change in velocity w.r.t time
[tex]\Rightarrow a=\dfrac{\Delta v}{\Delta t}\\\\\Rightarrow 32.05=\dfrac{\Delta v}{0.4}\\\\\Rightarrow \Delta v=12.82\ m/s[/tex]
thus, the change in velocity is [tex]12.82\ m/s[/tex]
15 points for each answer also I will report silly-bop answers!
One group of students did an experiment to study the movement of ocean water. The steps of the experiment are listed below.
Fill a rectangular baking glass dish with water.
Place a lighted lamp near the left edge of the dish.
Place a plastic bag with ice in the water near the right edge of the dish.
Put a few drops of ink in the water.
Observe the ink flow from the side where the lamp is placed towards the side where the ice bag is placed.
What does the students' experiment most likely demonstrate?
A. Surface-water sinks when heated.
B. Surface water moves from colder to warmer regions.
C. Surface water moves from warmer to colder regions.
D. Surface water moves irrespective of water temperature.
Answer:
Its D
Explanation:
The lamp and the ice bag were at the same place.
Sounds like the experiment was intended to show on a small scale ocean currents from the poles to the equator and back to the poles. The bag of ice would simulate the cold at the poles while the lamp would simulate the heat provided by the sun near the equator. With that in mind, let's look at the possible flaws and see what is likely.
Not enough ink was added
A transverse wave causes its medium to move in what direction?
Answer:
Explanation:
A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down.
Answer:
many directions
Explanation:
A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down.
If a box is pushed with a net force of 8.2N and the box has a mass of 11.3kg, what would be its acceleration?
Answer: 1.38 km/h
Explanation: Mass divided by Force
Electromagnetic waves are transverse waves. They consist of traveling electric and magnetic fields which oscillate periodically. What angle does the electric field make with the magnetic field in an electromagnetic wave?
A.) 30
B.) 45
C.) 60
D.) 90
Answer:
The answer is D.) 90
Explanation:
the electromagnetic wave is a transverse wave. the electric field makes an angle of 90° with the magnetic field. both these fields, in turn, make an angle of 90° with the direction of movement of the wave.
We are going to focus on the gravitational force between Earth and our Moon. The Earth has a mass of about 6 x 10/24 kg and the Moon has a
mass of about 7.3 x 10/22 kg. They are also currently about 4 x 10/8 meters apart.
The gravitational constant, G, is 6.67 x 10-/11 as always.
Question 1
If you were to weight yourself in the moon and the Earth, which would have the higher weight?
Answer
Gravity is what holds us down on the earth's (or moon's) surface. If you were to weigh yourself on a scale on Earth and then on the moon, the weight read on the moon would be 1/6 your earth weight
How much potassium nitrate, KNO3, would completely dissolve in 100g of water at 40℃?
A. 28 grams
B. 108 grams
C. 45 grams
D. 65 grams
Pls help, I'll mark brainiest I really need a good grade, so pls answer correctly
A -0.06C charge that moves downward is in a uniform electric field with the strength of 200 N/C. What is the magnitude and direction of the force on the charge
Answer:
think it's b
Explanation:
cuz
In a chemical reaction, the substances that interact are called the reactants.
A. True
B. False
Answer:
true
Explanation:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
A 2.0 kg pellet is placed in the barrel of a toy gun and is propelled by a spring of force constant 50 N/m. The spring is compressed 2m and then released. Calculate the maximum velocity of the pellet when shot horizontally. *
Answer:
10 m/s
Explanation:
Applying,
Kentic energy of the pelllet = Spring elestic energy
1/2(mv²) = 1/2ke²
mv² = ke²...................... Equation 1
Where m = mass of the pellet, v = velocity of the pellet, k = force constant of the spring, e = extension of the spring
make v the subject of the equation
v = √(ke²/m)................. Equation 2
From the question,
Given: k = 50 N/m, e = 2 m, m = 2.0 kg
Substitute these values into equation 2
v = √(50×2²/2)
v = √(50×2)
v = √(100)
v = 10 m/s
How can energy conservation be considered an energy source?
Answer:This could be in the form of using fewer energy services or using devices that require less energy.
Explanation:
How many hydrogen atoms can bond with this oxygen atom?
Oxygen atom
Question 2 options:
1
6
4
2
Answer:
2
Explanation:
Your friend wants to join the school track team, and has asked for your help to determine how fast she can run. What kind of information would you need to collect to help your friend???
Answer:
you calculate a specific type of run for example 100m and it takes 20 seconds to finish and calculate the time it takes them to finish
hope this helps
have a good day :)
Explanation:
You need th information about the time period she ran and the distance she covered in that time period to analyze her speed.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second.
The generally considered unit for speed is a meter per second.
Your friend wants to join the school track team and has asked for your help to determine how fast she can run the data of her time and the length of the distance she covered in that period of time because the only way to know how fast she runs is to analyze her speed by using the distance and the time.
Thus , you need information about the time period she ran and the distance she covered in that time period to analyze her speed.
Learn more about speed from here, refer to the link;
brainly.com/question/7359669
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A un cuerpo de 4kg que está en reposo sobre la superficie de la tierra, se aplica durante 8seg una fuerza de 60N dirigida verticalmente hacia arriba. Calcule la altura máxima que alcanza el cuerpo.
Answer:
[tex] y_{t} = 253.94 m [/tex]
Explanation:
Para resolver este problema debemos contemplar dos tramos.
En el primer tramo, la fuerza aplicada impulsa al cuerpo a subir una altura dada debido a la aceleración que genera esa fuerza.
[tex] \Sigma F = ma [/tex]
[tex] F - P = ma [/tex]
[tex] F - mg = ma [/tex]
En donde:
F: es la fuerza aplicada = 60 N
P: es el peso del cuerpo = mg
m: es la masa del cuerpo = 4 kg
g: es la aceleración debido a la gravedad = 9.81 m/s²
a: es la aceleración
Entonces, la aceleración generada por la fuerza aplicada es:
[tex] a = \frac{F - mg}{m} = \frac{60 N - 4kg*9.81 m/s^{2}}{4 kg} = 5.19 m/s^{2} [/tex]
Ahora, debemos calcular la altura recorrida mientras el cuerpo está acelerado hacia arriba:
[tex] y_{{1}} = y_{0} + v_{0}t + \frac{1}{2}at^{2} [/tex]
En donde:
[tex] y_{1}[/tex]: es la altura final del tramo 1 =? [tex] y_{0}[/tex]: es la altura inicial = 0
[tex] v_{0}[/tex]: es la velocidad inicial = 0 (parte del reposo)
t: es el tiempo = 8 s
[tex] y_{1} = 0 + 0 + \frac{1}{2}5.19 m/s^{2}*(8 s)^{2} = 166.08 m [/tex]
Por lo tanto, mientras el cuerpo está acelerado (durante los 8 s) recorre 166.08 metros.
Ahora, en el segundo tramo el cuerpo sigue subiendo hasta alcanzar una altura máxima para luego comenzar a descender. Podemos usar la siguiente ecuación para calcular la altura recorrida.
[tex] v_{f}^{2} = v_{0}^{2} - 2gy_{2} [/tex]
En donde:
[tex] v_{f}[/tex]: es la velocidad final = 0 (en la altura máxima)
[tex] v_{0}[/tex]: es la velocidad inicial
Primero debemos encontrar la velocidad inicial en el segundo tramo, que es igual a la velocidad final del primer tramo:
[tex] v_{f} = \sqrt{v_{0} + 2ay_{1}} = \sqrt{0 + 2*5.19 m/s^{2}*166.08 m} = 41.52 m/s [/tex]
Entonces, la altura recorrida en el segundo tramo es:
[tex] y_{2} = \frac{v_{0}^{2} - v_{f}^{2}}{2g} = \frac{(41.52 m/s)^{2} - 0}{2*9.81 m/s^{2}} = 87.86 m [/tex]
Finalmente, la altura máxima es:
[tex]y_{t} = y_{1} + y_{2} = 166.08 m + 87.86 m = 253.94 m[/tex]
Espero que te sea de utilidad!
how does a culture
of a community influence the life style of people.
plz answer with a nice explanation
I will give u like and follow u and also give u branist ok plz help
When a traffic light turns from red to green, it takes much more force and time for a large truck to get going than it does a small, compact car. This is an example of which law of motion?
Answer:
First Law of Motion.
Explanation:
Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.
In physics, Sir Isaac Newton's First Law of Motion is known as Law of Inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.
The inertia of a physical object such as a truck is greatly dependent or influenced by its mass; the higher the quantity of matter in a truck, the greater will be its tendency to continuously remain at rest.
Hence, it would take much more force and time for a large truck to get going when the traffic light turns green than it does for a small, compact car. This is an example of the first law of motion.
Improving your cardiovascular endurance, such as aerobic activity, can get your heart pumping, make you sweaty, and quicken your breathing. When you give your heart this kind of workout on a regular basis, your heart will get even better at its main job - delivering ____________ to all parts of your body.
Answer:
The correct answer is - oxygen.
Explanation:
Cardiovascular endurance is the ability to do physical activity or exercise without affecting or being tired for a longer time period. Aerobic exercise or activity can help to increase cardiovascular endurance.
Improving the cardiovascular system helps in delivering oxygen as per the demands with the help of the heart that pumps the oxygen-rich blood to different organs of an individual and lungs by inhaling enough oxygen.
what are the similarities for hydraulic and pneumatic systems?
Answer:
Explanation:
Pneumatic and hydraulic systems have many similarities. Both pneumatics and hydraulics are applications of fluid power. They each use a pump as an actuator, are controlled by valves, and use fluids to transmit mechanical energy.
A person stands on level ground with both feet equidistant from each other directly under their shoulders. In this case, the normal force on each foot is...
A. equal to the force of gravity on the person.
B. greater than the force of gravity on the person.
C. equal to 1/2 the force of gravity on the person.
D. unrelated to the force of gravity on the person.
Answer:
The correct option is C: the normal force of gravity on each foot is equal to 1/2 the force of gravity on the person.
Explanation:
Since the feet are equidistant from each other, the total torque is zero:
[tex] \Sigma \tau = 0 [/tex]
And the total forces acting on the feet are also equal to zero:
[tex] \Sigma F = 0 [/tex]
Hence, the normal force on the feet are:
[tex] W = N_{1} + N_{2} [/tex]
Where:
W: is the weight force
N₁: is the normal force of foot 1
N₂: is the normal force of foot 2
Since the normal force of each foot is the same, we have that N₁ = N₂ so:
[tex] W = 2N [/tex]
[tex] N = \frac{W}{2} [/tex] (1)
From the result of equation (1), we have that the normal force on each foot is equal to 1/2 the force of gravity on the person.
Therefore, the correct option is C: the normal force on each foot is equal to 1/2 the force of gravity on the person.
I hope it helps you!
ASAP Question 3 of 10
In the diagram shown below, the blue light ray represents a ray of light
incident on a boundary between media. The diagram represents:
D
O A. indention
B. diffraction
C. reflection.
O D. refraction
Answer:
the answer is refraction, btw could u
say which grades question this is
How does a helicopter fly ? ( I need it explained in the view of physics)
It is summertime and the temperature is 100 degrees Fahrenheit. Johnny decides he is going to go swimming. He jumps in his pool and the water is still cold. He decides to take the temperature of the pool. The thermometer reads 65 degrees Fahrenheit. Explain why the pool water is a lower temperature than the air surrounding it?
Answer:
Water temperatures are slow to heat up, It takes 4 times the energy to heat up water than to heat air. Water also "feels" colder because water is a more efficent medium than air to cool our body down.
Re word it tho
Hope this helps!!
pls somebody help there is a blank space between this and the question its screenshotted just look down
Answer:
This relationship is from Newtons Second Law of Motion
Newton's second law shows that there is a direct relationship between force and acceleration. The greater the force that is applied to an object of a given mass, the more the object will accelerate.
Its expressed as
F=ma