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A 28.0-g object moving to the right at 20.0 cm/s overtakes and collides elastically with a 7.0-g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision.
The quantity of charge q (in coulombs) that has passed through a surface of area 2.08 cm2 varies with time according to the equation q = 4t3 + 5t + 6, What is the value of the current density
"As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. What is the baseball's acceleration in m/s2 and in g's
Light of wavelength 0.50 ?m illuminates a soap film (n = 1.33). What is the minimum thickness of film that will give an interference when the light is incident normally on it
A beam of electrons is incident on two slits separated by a distance of 2.0×10-6 m. Calculate the kinetic energy of the electrons
An iron tower in is 372 meters tall on a cold day (T = -7.1 degrees Celsius). What is its height of the tower on a hot day
You are driving home from school steadily at 80 for 150. It then begins to rain and you slow to 50. You arrive home after driving 3 hours and 20 minutes.
A person pulls a 5.0 kg sled by a rope across a floor. The coeffecient of kinetic friction between the floor and the sled is 0.15. What is the horizontal acceleration of the sled
A rod is measured to be 12cm by an observer moving at 0.60c with respect to the length of the rod. What is the proper length of the rod
A girl walks 26 meters at an angle of 39° west of south. How far west of her starting point is she
How far from the lens should an object be placed so that its (virtual) image is at the near-point distance of 25 if the magnification is 8X
A solid cylinder of radius 0.35 m is released from rest from a height of 1.8 m & rolls down the incline as shown. Find the angular speed of the cylinder when it reaches the horizontal surface?
A hydraulic lift is used to jack a 920 kg car 42 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 350 N. What is the area of the input piston
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