A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car
A) The force of collision on the truck is greater then the force of collision on the car.
B) The force of collision on the truck is equal to the force of collision on the car.
C) The force of collision on the truck is smaller than the of collision force on the car.
D) The truck did not slow down during the collision.
E) The car did not slow down during the collision.
B
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Buoyancy: When a container of water is placed on a laboratory scale, the scale reads 120 g. Now a 20-g piece of copper (of density 8.9 g/cm3) is suspended from a thread and lowered into the water, not touching the bottom of the container. What will the scale now read? The density of water is 1.0 g/cm3.
A. 120 g B. 122 g C. 138 g D. 140 g
Waves on a String: The speed of sound in steel is 5000 m/s. What is the wavelength of a sound wave of frequency 660 Hz in steel?
A. 7.58 m B. 2.41 m C. 1.21 m D. 0.829 m E. 0.132 m
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A. 2.0 s B. 3.0 s C. 6.0 s D. 9.0 s E. 18.0 s