A fountain sends water to a height of 150 meters. What is the difference between the pressure of the water system and the atmospheric pressure?

When two objects collide, the impulse each delivers to the other is equal and opposite. But each object might experience a different acceleration. Calculate the acceleration of two objects in a given collision.

• How can you tell the difference between elastic and inelastic collisions? How would I set the first question up? Is there a specific equation I need to use?

How would I set it up? Do I need to first find the velocities of each object and then use those to find the acceleration of each?

1. A skier of mass 80 kg starts from rest and slides down a frictionless slope of length 35 m that is

inclined at an angle of 30 degrees with the horizontal. Ignore air resistance.

a. Calculate the work done by gravity on the skier, and the work done by the normal force

on the skier.

b. If the slope is not frictionless so that the skier has a final velocity of 25 m/s, calculate the

work done by gravity, the work done by the normal force, the work done by friction, the

force of friction, and the coefficient of kinetic friction.

A 1000-kg car rounds a curve on a flat road of radius 50 m at a speed of 50 km/h (14 m/s). Will the car follow the curve, or will it skid? Assume (a) the pavement is dry and s = 0.60; (b) the pavement is icy and s = 0.25

Two spherical shells have a common center. A -1.00 × 10^-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +4.00 × 10^-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitude and direction of the electric field at a distance (measured from the common center) of
(a) 0.20 m,(b) 0.10 m,c) 0.025 m.

The coefficient of static friction between teflon and scrambled eggs is about 0.04.
What is the smallest angle from the horizontal that will cause the eggs to slide across the bottom of the Teflon-coated skiller?

A small rock moves in water, and the force on it by the water is given by f=kv. The terminal speed of the rock is measured and found to be 2.0m/s. The rock is projected upward at an inital speed of 6.0m/s. You can ignore the buoyancy force on the rock

a) in the absence of fluid resistance, how high will the rock rise and how long will it take to reach this maximum height? I managed this one. b) when the effects of fluidresistance are included, what are the answers to the question in part a).

i manage to get the same z time as the solution on this website.

I and the website has the same equation for Vy.

the websites solution for Y = Vt*[1-e^(-k/mt))] which is the same expression as the example in the book.

But in the example in the book there is no initial speed Vy=0. In the question there is initla speed and therefor I think the expression for Y must be different from the examples expression. Therefore I think the solution of this question on this website must be wrong. Please comment me on this.

The following objects are released simultaneously from rest at the top of a 1.35m long ramp inclined at 3.10 degrees to the horizontal: a solid sphere, a solid cylinder, a hollow cylindrical shell, and a hollow ball.

Which wins the race? The solid Sphere won, I just cant get the positions of the other 3 objects

At the moment the winner reaches the bottom, find the positions of the other three objects.

please explain....

A block of wood has a mass of 3.54 kg and a density of 588 kg/m3. It is to be loaded with lead (1.13 × 104 kg/m3) so that it will float in water with 0.887 of its volume submerged. What mass of lead is needed if the lead is attached to (a) the top of the wood and (b) the bottom of the wood?

Cavendish measured the gravitation constant G, but actually he measured that constant on the Earth. What

Show your work for the following, not just the final answer:

a) What is the SIL for a sound of intensity Ia=5.2

The determined Wile E. Coyote is out once more to try to capture the elusive roadrunner. The coyote wears a new pair of power roller skates, which provide a constant horizontal acceleration of 15 m/s². The coyote starts off at rest 70 m from the edge of a cliff at the instant the roadrunner zips by in the direction of the cliff.

(a) If the roadrunner moves with constant speed, find the minimum speed the roadrunner must have to reach the cliff before the coyote.

_______ m/s

(b) If the cliff is 100 m above the base of a canyon, find where the coyote lands in the canyon. (Assume that his skates are still in operation when he is in "flight" and that his horizontal component of acceleration remains constant at 15 m/s².)

__________ m from the base

Your camera has a lens with a 35.0 mm focal length and film that is 36.0mm wide. In taking a picture of an airplane 22.7m in length, you find that the image of the airplane fills only three-fourths of the width of the film.

a.) How far are you from the airplane?

b.) How close should you stand if you want to fill the width of the film with the airplane's image?

Please show all work, thank you!

A 30 g of clay travelling east at 3.0 m/s collides with a 20 g ball of clay travelling north at 4.0 m/s. What are the speed and the direction of resulting 50 g blob of clay?