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Explain what would happen to the length of a meter stick traveling near the speed of light with its long dimension perpendicular to the direction of motion? Explain what would happen to the length of that same meter stick if its long dimension was in the same direction as the motion?
At the same instant that a 2.0-kg ball is dropped from 50 m above Earth, a second ball, What is the velocity of the center-of-mass of the two-ball system 0.5 seconds after the balls are released
standing on the sidewalk next to your parked car you hear thesiren of an approaching fire engine. what is the velocity of sound in air
a small block on a frictionless surface has a mass of 50 g. it is attached to a massless string passing through a hole
an object travels in a circle of radius 2.0 m. at time t 0 the object has a velocity of 10 ms and it slows uniformly
A uniform thin rod of length L=2.5 m and mass 2 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 0.3 kg ball of putty, moving in the horizontal plane of the rod, hits and sticks to one end. As..
What average force is required to accelerate 7 gram pellet from rest to 125 m/s over a distance of .8 m along the barrel of a rifle.
A boat with a horizontal tow rope pulls a water skier. She skis off to the side, so the rope makes an angle of 15.0 degrees with the forward direction of motion. how much work does the rope do on the skier
Two trains, each having a speed of 27 km/h, are headed at each other on the same straight track, What is the total distance the bird travels before the trains collide
Suppose that the aluminum cup inside a calorimeter has a mass of 48 g and contains 84 g of water. Both the cup and water are initially at a temperature of 5.6 degrees C, what is your best estimate of the specific heat of the aluminum
the acceleration record shown was obtained during the speed trials of a sports car. knowing that the car startys from
An object of mass m is on a frictionless table rotating with a given tangential speed vo with a radius of string ri. Find the final speed of the object after the rope was pulled down the distance d
In the lungs there are tiny sacs of air, which are called alveoli. An oxygen molecule (mass = 5.30 x 10 -26 kg) is trapped within a sac, and the ambiguity in its position is 0.130mm. What is the minimum uncertainty in the velocity of this oxygen mol..
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