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The head of a hammer (m=1.5 kg) moving at 4.5 m/s strikes a nail and bounces back with the same speed after an elastic collision lasting .075s. what is the magnitude of the average force the hammer exerts on the nail?
A 3.0 kg mass is attached to a vertical spring hanging from the ceiling. The spring and mass are stationary. The spring constant for the spring is 250 N/m. What is the gravitational potential energy of the system
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 304 K, What is the coefficient of performance of this refrigerator
An object is made of glass and has the shape of a cube 0.11 m on a side, according to an observer at rest relative to it. What is the moving observer's speed (in units of c) relative to the cube
Alpha particles of kinetic energy 5.10 MeV are scattered at 90° by a gold foil. What is the impact parameter
the total volume of a new house is 800 m3. before the heat is turned on the air temperature inside is 10degc and the
Consider a 61.5-cm long lawn mower blade rotating about its center at 3230 rpm. Calculate the linear speed of the tip of the blade
1.two paths lead to the top of a big hill. one is steep and direct while the other is twice as long but less steep.
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.40sin(2?t), Find the resonance angular frequency of the system
Draw the free-body diagram of the system and find the value of the force F acting on the piston C.
A 4.3-kg solid sphere, made of metal whose density is 4700 kg/m3, is suspended by a cord. Find the density of the liquid
In a hydraulic lift, the maximum gauge pressure is 18.5 atm. If the diameter of the output line is 18.7 cm, what is the heaviest vehicle that can be lifted
When a guitar string is sounded along with a 434Hz tuning fork, a beat frequency of 1.00Hz is heard. When the same string is sounded along with a 426Hz tuning fork, the beat frequency is 9.00Hz. What is the frequency of the string?
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