Which is not an example of approximate simple harmonic motion?
a. A ball bouncing on the floor.
b. A child swinging on a swing.
c. A piano string that has been struck.
d. A car's radio antenna as it waves back and forth.
a
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Two objects of equal mass hit a wall with the same velocity. They both rebound with the same velocity. Both objects experience the same momentum change but one experiences twice the force as the other. Which of the following statements is true?
A. the contact time between the object and the wall of one is twice the contact time of the other B. the contact time between the object and the wall of one is equal to the contact time of the other C. the contact time between the object and the wall of one is one-half the contact time of the other D. the change in the kinetic energy is the same for the two objects E. the contact time between the object and the wall of one is 1/3 the contact time of the other
Angular momentum is defined as
A. Moment of inertia * velocity B. Mass * angular velocity C. Mass * velocity D. Moment of inertia * angular velocity
The suffix -ose in a compound's name signifies a(n)
a. amide. b. alcohol. c. carbohydrate. d. enzyme.
In the context of neutron stars, which of the following statements is true of pulsars?
A) Neutron stars older than 10 million years rotate too slowly to generate detectable radio beams. B) When a pulsar first forms, it spins only around 10 times a second. C) As a pulsar blasts beams of radiation outward, its rotation speeds up. D) Supernova remnants last more than 150,000 years before they mix into the interstellar medium and disappear.