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A 0.40 kg billiard ball traveling at a speed of 16 m/s strikes the side rail of a pool table at an angle of 60° (Fig. 6.26). If the ball rebounds at the same speed and angle, what is the change in its momentum?
a 1.28m long vertical glass tube is filled with a liquid at 20 degrees celcius. how much will the height of the liquid
A cube of mass m1 = 8.8 kg is sitting on top of another cube of the same size, What is the magnitude of the normal force with which the bottom cube is acting on the top cube
Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. Estimate the net force that ultimately stops the person
A large rock that weighs 164.0 N is suspended from the lower end of a thin wire that is 3.00 m long. The density of the rock is 3200 kg/m^3. What is the density of the liquid
The temperature of the surface of a certain star is 7500 K. Most hydrogen atoms at surface of the star are in the electronic ground state. What is the approximate fraction of hydrogen atoms that are in the first excited state (and therefore could ..
What's the quickest way to approach this problem? A car is traveling at 80 km/h along the highway. A second car is located 1 km behind, but traveling at 100 km/h. How long does it take for the second car to pass the first?
A 0.46 kg piece of wood floats in water but is found to sink in alcohol (specific gravity = 0.79) in which it has an apparent mass of 0.037 kg
In outer space, there are two planets that are separated by a distance of 345x10^8 km. These two planets have the extact same mass. What is the mass of each star when it takes 8.9 earth years to complete one orbit
A 60kg person walks on a 100kg log at therate of 0.80m/s (with respect to he log). With what speed does the log move
an object starts moving in a straight line from position x at time t0 with velocity v0 . its acceleration is given by
A light ray in air is incident on a water (n = 1.333) surface at a 65.0° angle of incidence. find the angle of reflection and refraction
A 8kg block is attached to a light rope that passes over a uniform disk-shaped 4kg pully of radius 0.6m without slipping. On the other side of the puly the rope is attached to a light unstreched spring with a stiffness
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