PHYSICS HIGH SCHOOL

How is pressure measured?a. Pressure is measured as force per inch
b. Pressure is measured as force per gram
c. Pressure is measured as force per unit area
d. Pressure is measured as force divided by mass
I think its D...

Answers

Answer 1
Answer:

Answer: The correct answer is " Pressure is measured as force per unit area".

Explanation:

Pressure is defined as the force per unit area.

The expression for the pressure is as follows:

P=(F)/(A)

Here, F is the applied force and A is the area.

The pressure is inversely proportional to the area. More the area, lesser will be the pressure. Lesser the area, more will be pressure.

For example, the area of the strap of the school bag is more so that there will be less pressure on the students's shoulder.

Therefore, the correct option is (c).
Answer 2
Answer: Pressured is measured by the Force per unit area 

Related Questions

A slingshot is used to launch a stone horizontally from the top of a 20.0 meter cliff. The stone lands 36.0 meters away.a. At what speed was the stone launched?b. What is the speed and angle of impact?
1. Two charged objects repel each other whentheir charges are of different signs they have the same number of protonstheir charges are of the same signs they have the same number of electrons2. Batteries typically have two positive terminalstwo negative terminals one positive and one negative terminal no terminals
The process in which a substance changes from a gaseous state to the liquid state is A. critical temperature. B. absolute zero. C. evaporation. D. condensation.
because the snow suddenly gets too slushy, you decide to carry your 100-newton sled the rest of the way home. How much workdo you you do when you pick up your sled, lifting it 0.5meter upward? How much work do you do to carry the sled if your house is 800 meters away?
A thin spherical glass shell in air is filled with an unknown liquid. A horizontal parallel light beam is incident on the shell and it is observed that the light is brought to focus on the surface of the shell directly opposite of the incoming beam. What is the refractive index of the liquid?ie. the answer is 2- I just don't know how they got there

The Earth has a radius of 6,400 kilometers. A satellite orbits the Earth at a distance of 12,800 kilometers from the center of the Earth. If the weight of the satellite on Earth is 100 kilonewtons, the gravitational force on the satellite in orbit is?It would be great if you could add a few words of explanation.

Answers

By using a universal gravitational force, we can get that F_(g) = (G. m_(1) . m_(2))/( r^(2) ). 

For note : r is a distance from center of the earth to the object.

Then, if r_(1) is 6.400 km, and if r_(2) is 12.800 km,
we can say that r_(2) is 2r_(1)

In first equation we can say that :
F_(g) = (G.m_(1) m_(2) )/( r_(1)^(2) ) = 100.000 N

then in second equation we can say that :
F_(g) = (G.m_(1) m_(2) )/( r_(2)^(2) ), 
F_(g) = (G.m_(1) m_(2) )/( (2r_(1))^(2) ) (because r_(2) is 2r_(1) )
F_(g) = (G.m_(1) m_(2) )/( 4r_(1)^(2) ), 
we can say that : F_(g) = (1)/(4) (G.m_(1) m_(2) )/( r_(1)^(2) )
so, by plugging first equation into second equation, we can get
F_(g) = (1)/(4) (G.m_(1) m_(2) )/( r_(1)^(2) ) = (1)/(4) . 100.000 N = 25.000 N

How many seconds would an Olympic skier take to race down a 2500 meter course going 250 m/sec?

Answers

Answer:

10 seconds

Explanation:

Hope this is right and that it helps.

You see if the skier is going 250 meters a second 250 times 10 is 2500 so it would take the skier 10 seconds.

Answer:

10 sec.

Explanation:

distance = 2500 meters

velocity = 250 meter/second

time = distance / velocity

       =    2500 meters    

          250 meter/second

       = 10 sec.

explain why the motion of a body which is moving with constant speed in a circular path is said to be accelerated ?

Answers

In this case when a body moves in circular path acceleration is called Centripetal acceleration... Body in circular path moves with constant speed but its direction changes at every instant of time ...as acceleration is produced when either magnitude or direction of velocity changes...here magnitude remains same but direction changes so body is said to be accelerated....
as its velocity changes and hence is known as accelarated

If the mass of Earth were increased by a factor of 2.00 , by how many times would the force between Earth and the Sun increase?

Answers

Answer:

If the mass of Earth were increased by a factor of 2.00, the force between Earth and the Sun would increase by a factor of 2.00 as well.

Explanation:

The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The formula for gravitational force (F) is given by:

F = (G * m1 * m2) / r^2

Where:

F = gravitational force

G = gravitational constant (a constant value)

m1 = mass of the first object

m2 = mass of the second object

r = distance between the centers of the two objects

If the mass of Earth is increased by a factor of 2.00 (meaning it becomes 2 times its original mass), we can denote the original mass of Earth as "M" and the increased mass as "2M."

Now, let's calculate how the force between Earth and the Sun changes:

Original force (F1) = (G * M * Msun) / r^2

New force (F2) = (G * 2M * Msun) / r^2

Now, we can find the ratio of the new force to the original force:

F2 / F1 = [(G * 2M * Msun) / r^2] / [(G * M * Msun) / r^2]

Notice that the gravitational constant (G), distance (r), and the mass of the Sun (Msun) are the same in both equations and cancel out when calculating the ratio. Therefore, you're left with:

F2 / F1 = (2M) / M = 2

So, if the mass of Earth were increased by a factor of 2.00, the force between Earth and the Sun would increase by a factor of 2.00 as well.

What roles do exchange particles play in an interaction?

Answers


The exchange particles you are talking about are probably the gauge bosons. They are elementary bosons, meaning that they are elementary particles making part of the standard model and they have integer spin. There are four of them: The photon, the gluon, the W+ and W- bosons and the Z boson. The photon basically is the particle of light being an excitation, if you will, of the electromagnetic field so that is mediates the electromagnetic force. The only thing that differs from long range photons (light) is that they are what is called virtual photons but that is for another subject. Then you have the gluons that come in 8 varieties and their role is to interchange the color charge in between quarks so that it mediates the strong nuclear force, the force that keeps quarks bounded into protons. And then finally there are the W+, W- and Z bosons that mediates this time, the weak nulear force, the force that allows protons to coexist in the nucleus of atoms with neutrons. I hope that helped you, but as i usually do, i tried to simplify my answer beacause i could have written a lot mor about that!

Which of the following statements about ice melting is true and why?A. Energy flows from the ice to its surroundings.
B. Water molecules move from their fixed position.
C. Water molecules lose energy.
D. The temperature of the ice increases as it melts.

Answers

The answer for this question is part B that is Water molecules move from their fixed position.


This is because when water is freeze it is in a solid condition that means the molecules are held together tightly and are are vibrating in their fixed positions.


As soon as the molecules gain energy they start to move around from their fixed positions and turn into a liquid.


In the process of doing so ice melts and becomes water.
option(D) is true
the ice molecules are taking in heat from its surroundings to melt and form water.This increases the temperature of ice as it melts.
option(c) can also be true because to form water,the intermolecular force between the molecules gets weak which allows them to move from their fixed point.
Other Questions
How much force is needed to stop a 90-kg soccer player if he decelerates at 15 m/s^2?A. 15 N B. 6 N C. 135 N D. 1,350 N
What is the kinetic energy of a 1.0-kg ball moving at 3.0 m/s?
an egg is thrown straight up at the edge of a 100m cliff with an initial velocity of 20m/s. how long will it take for the egg to hit the ground below?
Special relativity questions?1.) A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest on Earth a. the light will reach the front of the rocket after it reaches the back of the rocket. b. the light will reach the front of the rocket at the same instant that it reaches the back of the rocket. c. the light will reach the front of the rocket before it reaches the back of the rocket. 2.) A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest in the rocket a. the light will reach the front of the rocket before it reaches the back of the rocket. b. the light will reach the front of the rocket at the same instant that it reaches the back of the rocket. c. the light will reach the front of the rocket after it reaches the back of the rocket. 3.) An astronaut in an inertial reference frame measures a time interval Δt between her heartbeats. What will observers in all other inertial reference frames measure for the time interval between her heartbeats? a. Δt b. less than Δt c. more thanΔt d. The answer depends on whether they are moving toward her or away from her. 4.) You are a passenger on a spaceship. As the speed of the spaceship increases, you would observe that a. the length of your spaceship is getting shorter. b. the length of your spaceship is not changing. c. the length of your spaceship is getting longer. 5.) A star is moving towards the earth with a speed at 90% the speed of light. It emits light, which moves away from the star at the speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star? a. 0.90c b. 1.9c c. 1.20c d. 1.1c e,) c