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Q. A cardinal (Richmondena cardinalis) of mass 3.90×10-2 and a baseball of mass 0.144 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
Q. How fast should a car move toward you for the car's horn to sound 3.0% higher in frequency than when the car is stationary? The speed of sound is 343 m/s. Give your answer to the nearest 0.1 m/s.
An object explodes and breaks into 2 pieces. Piece 1 has twice the mass of piece 2. Which piece has more momentum
In general, for a concave mirror with a focal length +f, how far should an object be placed from the mirror to form a real image which is neither enlarged nor reduced(enter your answer as a multiple of f)?
A 0.19-kg stone is held 1.2 m above the top edge of a water well and then dropped into it. The well has a depth of 5.6 m. What is the change in gravitational potential energy of the system from release to reaching the bottom of the well
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.60×106N, What is the total work done by the two tugboats on the supertanker
25.00kg lead sphere is hanging from a hook by a thin wire 3.50m long, and is free to swing in a complete circle. What must be the minimum initial speed of the dart
A cannon tilted up at a 30° angle fires a cannon ball at 80 m/s from atop a 18 m high fortress wall. What is the ball's impact speed on the ground below
A standing wave is produced on a clothesline 8m long when five birds sit on the line. No birds sit on the end. What is the wave speed
A 0.60 kg body oscillates on a spring that, when extended 1.0 mm from equilibrium, has a restoring force of 7.0 N. find the angular frequency of oscillation
Integrated circuits are manufactured in vacuum chambers in which the air pressure is 6.00×10?11 mm of Hg, determine the mean free path of a molecule
A damped mass-spring system oscillates at 275-Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 3.20cm and the energy of the oscillating system is then 32 J.
A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. What is the amplitude of each wave
0.023mol of a diatomic gas, with initial temperature 25?C, How much heat is added during this process
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