Answer:
You will be able to tell whether the unknown cell is from an animal or from a plant through the knowledge of difference between plants and animal cells.
Explanation:
A cell can be defined as the simplest bit of living matter which exhibits a variety of shapes and sizes and that can exist independently.
When a slide of an unknown cell is studied under a microscope, different cell structures would be observed which would be used to conclude if the cell on the slide is a plant or animal cell.
The following features are observed in a plant cell:
--> cellulose cell wall is present
--> Chloroplast is present
--> A large central vacuole is present
--> Centriole is absent
The following features are observed in animal cell:
--> Cellulose cell wall is absent
--> Chloroplast is absent
--> Small vacuoles is present
--> Centriole is present
The difference between a plant and an animal cell can be seen from the features above and a clear knowledge of this will help the student tell whether the unknown cell is from an animal or from a plant.
Please help!!!
The Ice cube melting on the conducting plate
What is the main type of thermal energy...
. Conduction
.Convection
. Radiation
Answer:
conduction, convection, and radiation
Explanation:
when you hold an ice cube, heat is transferred from your warm hand to the cold ice and melts it. Your hand feels cold because it is losing heat energy. There are three ways that heat can be transferred: by conduction, convection, and radiation. heat through solids.
Light waves travel at 3 × 10 8 m/s. If the light wave has a particular wavelength of 400 nm (400 × 10 –9 m), calculate its frequency.
Answer:
[tex]f=7.5\times 10^{14}\ Hz[/tex]
Explanation:
Given that,
The wavelength of light, [tex]\lambda=400\ nm=400\times 10^{-9}\ m[/tex]
The speed of light, [tex]c=3\times 10^8\ m/s[/tex]
We need to find the frequency of light. We know that,
[tex]c=f\lambda[/tex]
Where
f is the frequency
So,
[tex]f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{400\times 10^{-9}}\\\\f=7.5\times 10^{14}\ Hz[/tex]
So, the frequency of light is [tex]7.5\times 10^{14}\ Hz[/tex].
2. A hanging wind-chime on a calm day would have kinetic or potential energy?
kinetic
potential
Answer:
it would have potential energy
How much heat does it take to raise 0.0438 kg of aluminum from room temperature (20.0°C) to its melting point (660°C)?
HELP
Answer:
2.5x10^4 J (scientific notation)
25,000 (Acellus)
Equation:
Q=mcΔT
where:
Q=heat
m = mass
c = specific heat
ΔT=change in temperature
Any rearranging?
Let's see.
No, we need heat.
So no rearranging.
Plug in the numbers and solve
It takes approximately 28,224 joules of heat to raise 0.0438 kg of aluminum from room temperature to its melting point.
To calculate the heat required to raise the temperature of aluminum from room temperature to its melting point, we need to use the specific heat capacity formula: Q = m × c × ΔT
where:
Q = heat (in joules)
m = mass of aluminum (in kilograms)
c = specific heat capacity of aluminum (in joules per kilogram per degree Celsius)
ΔT = change in temperature (in degrees Celsius)
Given:
Mass of aluminum (m) = 0.0438 kg
Specific heat capacity of aluminum (c) = 900 J/kg°C (approximate value for aluminum)
Change in temperature (ΔT) = melting point (660°C) - room temperature (20°C) = 640°C
Now, let's calculate the heat (Q):
Q = 0.0438 kg × 900 J/kg°C × 640°C
Q = 28,224 J (joules)
So, it takes approximately 28,224 joules of heat to raise 0.0438 kg of aluminum from room temperature to its melting point.
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Find the electric field a distance z above the midpoint between equal and opposite charges,a distance d apart
Answer:
Ex = [tex]2 k q \frac{x}{(x^2 + z^2) ^{3/2}}[/tex] , E_z =0
Explanation:
To find the electric field of each charge, let's use
E = k q / r²
where the field for a positive charge is outgoing and for a negative charge it is incoming.
Since the electric field is a vector magnitude, let's add its components at the point z
X axis
Eₓ = E₁ₓ + E₂ₓ
Eₓ = 2 E₁ₓ
Z axis
E_z = E_{1z} -E_{2z}
E_z= 0
Let's find the expression for the electric field
the distance from the charge to the test point, using the Pythagorean theorem is
r² = (x-0) ² + (0-z) ²
E = [tex]k \frac{q}{x^2 + z^2}[/tex]
with trigonometry we can find its components
cos θ = E₁ₓ / E
E₁ₓ = E cos θ
we substitute
Eₓ = 2 E cos θ
where the cosine
cos θ = x / r
Ex = [tex]2 k \frac{q}{x^2 + z^2} \ \frac{x}{\sqrt{x^2 + z^2} }[/tex]
Ex = [tex]2 k q \frac{x}{(x^2 + z^2) ^{3/2}}[/tex]
E_z = 0
A wave carries _____ from one place to another
Mechanical waves carry energy through ______
Answer:
Energy
Matter
Explanation:
Bcuz I just did it on the warm up for edge
Answer:
the answer is energy and matter trust me
Explanation:
El diámetro del embolo de una jeringa para inyección mide 1.5 cm. Una enfermera ejerce una fuerza de 2N cuando inyecta a su paciente. Calcule la presión que ejerce el fluido inyectado sobre las venas.
Answer:
Presión = 11111,11 N/m
Explanation:
Dados los siguientes datos;
Diámetro = 1,5 cm a metros = 1,5 / 100 = 0,015 m
Fuerza = 2N
Para encontrar la presión;
En primer lugar, determinaríamos el área del círculo usando la fórmula;
Área del círculo = πr²
Radio = diámetro/2 = 0.015/2 = 0.0075 m
Área de la jeringa = 3.142 * 0.0075²
Área de la jeringa = 3.142 * 0.00005625
Área de la jeringa = 0.00018 metros
Ahora, podemos encontrar la presión usando la fórmula;
Presión = fuerza/área
Presión = 2/0.00018
Presión = 11111,11 N/m
HELP ASAP Which statement describes the water particles when condensation takes place?
A. The particles gain heat energy and move closer to each other
B. The particles lose heat energy and move closer to each other
C. The particles gain heat energy and move away from each other
D. The particles lose heat energy and move away from each other
Which of the following organs are found in the
lower gastrointestinal tract? Check all that apply.
answers are above
Answer:
small intestine, tongue and large intestine
Explanation:
The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
A student analyzes the data and concludes that one bird flies at a speed of 20 meters per second during a portion of its migration. Select the two types of data that the student needed to form this conclusion
Answer:
The answer is "The location of the bird and time interval between pieces of information".
Explanation:
Please find the complete question in the attached file.
The Radar is the instrument used to gather data from birds by researchers. This would be the primary tool to study the flight behavior of migrating birds with the impact of environmental influences including the ecology of migratory movements, from the broad population group for both the distribution of land areas and geomorphology as well as meteorological systems to the shift in the behavior of airlines of particular birds, especially when responding to lead routes.
Two train cars with the same mass (30,000 kg) are traveling in the same direction when they collide.
Train Car A has a velocity of 10 m/s and Train Car B has a velocity of 5 m/s. What is their total
momentum after the collision? Make sure to show all your work and include proper units.
Answer:
25
Explanation:
I just did this
michael's house is 5.0 km away from his school. How long would it take him to go ti school, riding a bus, if its velocity is 25 km/h?
Pleaseee answer correctly
I mark brainliest who answer this
Answer:
12 mins
Explanation:
The distance covered is 5 km, divide this by 25 to get the fraction of an hour it takes. Doing this you get .2, times this by 60 min (1 hour) to get how many mins it takes
A spring has an unstretched length of
12.0 cm. Its stiffness k is 8 N/cm. What load is
needed to stretch the spring to a length of 15.0 cm?
Answer:
24 N
Explanation:
Given,
Unstretched length or original length , x1 = 12cm
Stiffness constant, k = 8 N/cm
Load required to take spring to a length , x2 of 15cm
Recall the relation :
F = Ke
Where, e = extension
e = x2 - x1
e = (15 - 12) = 3
F = ke
F = 8 N/cm * 3cm
F = 24 N/cm*cm
F = 24 N
Hence, required load = 24 N
what made the dinosaurs instinct
Answer:
Eruptions/Volcano
Explanation:
poop fell from the sky
If the radius increased between the two objects what would happen to gravitational force between them?
Answer:
The Gravitational Force would decrease
Explanation:
The equation Gm1m2/r^2 is the equation for gravitational force. If you look, as we increase the radius, the overall value will decrease as we move further apart.
GIVING BRAINLIEST PLEASE HELP ME!!!
-If you answer correctly ill give you brainliest which will give you 25 points-
Answer:
Explanation:
1. Conduction
2. Convection
3. Radiation
work done in taking charge from one point of a conductor to is another point is called
Answer:
⁸
Explanation:
electric potential
I think so
A jet plane travels east for
661.8 meters in 6 seconds.
What is the velocity of the plane?
velocity = distance = time
3,970.8
Explanation:
v=661.8×6
3,970.8
When you use a microwave, what is the main way that heat is transferred?
1. radiation
2. convection
3.conduction
Answer:
the correct answer is 1. radiation
Expresa en notación científica los siguientes números en notación científica estándar: a) 9367421= b) 7241= c) 0.0005519= d) 0.02=
Answer:
so yeah it is Respuesta
If the car goes exits a freeway and goes from 65
mph to 35 mph is it accelerating?
Answer:
No, the car is decelerating
Explanation:
No the car is decelerating if it exits a freeway and goes from 65
mph to 35 mph since the change in velocity is negative.
change in velocity = final - initial
change in velocity = 35 - 65
change in velocity = -30mph
Since the change in velocity is negative, hence the car is decelerating. Deceleration is a negative acceleration
PLA help if you understand
Answer:
b - it is not based on experimental data collected by scientists
How do positive and negative acceleration differ?
Positive acceleration represents an object speeding up; negative acceleration represents an object slowing down.
Positive acceleration moves north or east; negative acceleration moves south or west.
Positive acceleration occurs when there is more velocity than speed; negative acceleration occurs when there is less velocity than speed.
Positive acceleration occurs when an object changes its speed but not its direction; negative acceleration occurs when an object changes both its speed and direction.
Answer:
Positive acceleration moves north and east but negative acceleration moves south and west
Calculator
What is the value of x?
Enter your answer in the box.
Х
24
x =
7
2
3
4 5 6 7 8
9
Answer:
25
Explanation:
By Using Pythagoras Theorem,
h^2=p^2+b^2
or, x^2=(24)^2+7^2
or, x^2=576+49
or, x^2=625
or, x=√625
•°• x=25
The value of x in this figure is 25.
What is Pythagorean theorem ?
Pythagorean theorem is applicable to only right angle tringle. it is defined as square of the hypotonias is equal to the square of sum of base and height.
i.e. hypotonias² = base² + height².
In this figure given values are,
Base = 7
Height = 24
hypotonias x = ?
according to Pythagorean theorem,
hypotonias² = base² + height²
hypotonias² = 7² + 24²
hypotonias² = 625
hypotonias = 25
Hence the value of x is 25.
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Why does steam at 100°c give severe burn than water at 100 c?
Explanation:
Steam will produce more severe burns than boiling of water because steam has more heat energy than water due to its latent heat of vaporisation and additionally latent heat of condensation. Steam and boiling water can exist at varing temperature but it is only correct to assume here that both are at same temperature.
Determine both the mass and the charge of a block of material consisting of 3 x 10^27 protons, 3 x 10^37 neutrons, and 3.1 x 10^27 electrons.
Answer:
The mass of the block of material is 3 x 10³⁷ g/mol
The charge of the material is 4.8 x 10⁸ C
Explanation:
Given;
number of protons of the material, P = 3 x 10²⁷
number of neutrons in the material, N = 3 x 10³⁷
number of electrons in the material, E = 3 x 10²⁷
The mass of the block of material is calculated as follows;
M = P + N
M = 3 x 10²⁷ + 3 x 10³⁷
M = 3 x 10³⁷ g/mol
The charge of the material is calculated as follows;
charge of 1 electron = 1.6 x 10⁻¹⁹ C
charge of 3 x 10²⁷ electrons = 3 x 10²⁷ electrons x 1.6 x 10⁻¹⁹ C
= 4.8 x 10⁸ C
A 12 kg rock that is moving at 5.1 m/s in the +x direction experiences a net impulse of 98 N-m in the same direction. What is its final momentum?
The final momentum will be 159.2 kg m/sec. The change in the momentum is the difference of the final and the initial momentum.
What is momentum?The momentum is defined as the product of mass and the velocity of the body. It is denoted by the letter P. It occurs due to the applied force. Its unit is Kg m/s.
The given data in the problem is;
The mass of rock is,12 kg
The velocity is,v= 5.1 m/s
The momentum is P
The momentum is found as;
[tex]\rm P_i = mv \\\\ \rm P_i = 12 \times 5.1 \\\\ P_i=61.2 \ kg m/sec[/tex]
From Newtons second law, impulse is equal to the change in the momentum.
[tex]\rm I =\triangle P \\\\ \rm I =P_f-P_i \\\\ \rm 98 = P_f-61.2 \\\\ P_f =159.2 \ Kg m/sec[/tex]
Hence, the final momentum will be 159.2 kg m/sec
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Tarzan, whose mass is 100 kg, is hanging at rest from a tree limb. Then he lets go and falls to the ground. Just before he lets go, his center of mass is at a height 2.9 m above the ground and the bottom of his dangling feet are at a height 2.1 above the ground. When he first hits the ground he has dropped a distance 2.1, so his center of mass is (2.9-2.1) above the ground. Then his knees bend and he ends up at rest in a crouched position with his center of mass a height 0.5 above the ground. Consider the point particle system. What is the speed v at the instant just before Tarzan's feet touch the ground?
Answer:
[tex]6.42\ \text{m/s}[/tex]
Explanation:
v = Final velocity
u = Initial velocity = 0
s = Displacement of Tarzan's feet = 2.1 m
a = g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
From the kinematic equations we get
[tex]v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 2.1+0}\\\Rightarrow v=6.42\ \text{m/s}[/tex]
At the instant just before Tarzan's feet touch the ground the velocity of his feet are [tex]6.42\ \text{m/s}[/tex].
The speed at an instant just before Tarzen's feet touch the ground will be
[tex]V=6.42\ \dfrac{m}{s}[/tex]
What is speed?The speed of any body is defined as the movement of the body with respect to the time.
It is given in the question that
Mass of the Tarzen m=100 kg
The distance of the Tarzen's feet from the ground s=2.1 m
The acceleration due to gravity [tex]a=9.81\ \frac{m}{s^2}[/tex]
The speed of the Tarzen will be calculated by applying the equation of motion.
[tex]v^2=u^2+2as[/tex]
Since initial velocity is zero u=0
[tex]v^2=2as[/tex]
[tex]v=\sqrt{2as}[/tex]
[tex]v=\sqrt{2\times 9.81\times 2.1} =6.42 \ \frac{m}{s}[/tex]
Thus the speed at an instant just before Tarzen's feet touch the ground will be
[tex]V=6.42\ \dfrac{m}{s}[/tex]
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Waldo needs to know how much force to apply in order to move a 4000-kg object at 2 m/S2. Which law should he refer to
Answer:
Newton's second law of motion?
If an electron moves in a circle of radius 21 cm perpendicular to a B field of 0.4 T, what are the speed of the electron and the frequency of motion?
Answer:
a)
[tex]v = 4.048 *10^6[/tex] m/s
b)
Angular frequency = [tex]1.92 * 10^7[/tex]
Explanation:
As we know
[tex]v = \frac{qBr}{m}[/tex]
q is the charge on the electron = [tex]3.2 * 10^{-19}[/tex] C
B is the magnetic field in Tesla = [tex]0.4[/tex] T
r is the radius of the circle = [tex]0.21[/tex] m
mass of the electrons = [tex]6.64 * 10^{-27}[/tex] Kg
a)
Substituting the given values in above equation, we get -
[tex]v = \frac{3.2 * 10^{-19}*0.4*0.21}{6.64 * 10^{-27}} \\v = 4.048 *10^6[/tex]m/s
b)
Angular frequency =
[tex]\frac{4.048 * 10^6 }{0.21} \\1.92 * 10^7[/tex]