A piston exerts a force of 2,500 newtons on liquid in a cylindrical container. If the pressure on the top of the liquid is 12.5 kilopascals, find the area of the surface of the liquid, in square meters. ? please help

Answers

Answer 1

Answer: Here are the choices.

A. 200 m
B. 31.25 m
C. 0.2 m
D. 5 m

Pa = N/m²
m² = N/Pa

12.5 kPa = 12500 Pa

m² = N/Pa
m² = 2500 / 12500
m² = 0.2

C. 0.2 m²

So the correct answer is 0.2m^2

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Is there a benefit to cooking in a regular oven compared to a convection oven? Why??

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Yes there is a benefit it is that a regular oven is faster at cooking because it can go to higher tempatures

convectional oven has a lower rate of acceleration, why regular oven has a faster rate.

If mechanical energy is conserved in a system the energy at any point in time can be in the form of

Answers

The mechanical energy of the system at any point in time can be in the form of kinetic energy, potential energy, and elastic energy. These all are interconvertible, hence mechanical energy is conserved.

What is Mechanical Energy?

The term mechanical energy accounts for the total energy by the virtue of position as well as the motion of an object.

When an object is dropped from a certain height, then the mechanical energy of the object at any instant is given as the sum of kinetic energy and potential energy. The expression is given as,

ME = KE + PE

But at some point in time, the potential energy can be in the form of elastic energy as well. This energy is known as spring potential energy. Hence, the mechanical energy is conserved in a system at any point considering the forms like kinetic energy, potential energy, and elastic energy.

Thus, we can conclude that the mechanical energy of the system at any point in time can be in the form of kinetic energy, potential energy, and elastic energy. These all are interconvertible, hence mechanical energy is conserved.

Learn more about mechanical energy here:

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potential, kinetic, elastc energies

The theoretical line perpindicular to the surface where a light ray hits a mirror is called the

Answers

That's called the "normal" to the surface at that point.

Calculate the resistance of a lamp that draw 0.75 A current when connected to 4.5 V.

Answers

Calculate the resistance using the equation:

V=IR

In the question, the following values are given:

V = 4.5
I = 0.75

Substitute the values into the equation to find R, the resistance:

V = IR

4.5 = 0.75R

R = 4.5 / 0.75

R = 6 ohms

Plizz help meeee thanks and have a wonderful day

Answers

Answer:

This is a Upside down Glass of Water Experiment

Explanation:

if I interpret the graphic correctly, then there is a basin fully filled with water on the left, then a piece of paper of a piece of glass, where the paper is in contract with the water on the left, and some water is delivered to the right.

then i suspect this shows the capillary effect of very narrow channels of water. like in the very tiny spaces between the fibers of the paper. as long as the paper is in contact with the water on the left, and the level of water is there higher than on the right, the surface tension of water kind of propels itself further along these narrow channels in the paper and supported by gravity and air pressure it drops even into the other side.

If the velocity of a body changes from 13 m/s to 30 m/s while undergoing constant acceleration, what's the average velocity of the body? A. 28 m/s
B. 17 m/s
C. 21.5 m/s
D. 19.5 m/s

Answers

Since the acceleration is constant, the average velocity is simply the average of the initial and final velocities of the body:

$v_(avg) = (v_f+v_i)/(2)=(30 m/s+13 m/s)/(2)=21.5 m/s$

We can proof that the distance covered by the body moving at constant average velocity $v_(avg)$ is equal to the distance covered by the body moving at constant acceleration a:

- body moving at constant velocity $v_(avg)$ : distance is given by

$S=v_(avg)t = (v_f+v_i)/(2)t$

- body moving at constant acceleration $a=(v_f-v_i)/(t)$ : distance is given by

$S=v_i t+ (1)/(2)at^2 = v_i t + (1)/(2)(v_f-v_i)/(t)t^2=(v_i+(1)/(2)(v_f-v_i))t=(v_f+v_i)/(2)t$

The answer is 21.5 m/s

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