Drummers like to have high-pitched cymbals that vibrate at high frequencies. To obtain the highest frequencies, a cymbal of a fixed size should be made of a material
a. with a low Young's modulus and a low density.
b. with a low Young's modulus and a high density.
c. with a high Young's modulus and a low density.
d. with a high Young's modulus and a high density.
e. composed of a metal-plastic laminate.
c
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(For discussion.) On the basis of the information presented, which do you think is the most plausible resolution of the Collapse Rule’s problems? Why?
A. The decoherence model. B. Some modification of the Time Evolution Rule that allows genuine collapse to occur. C. A human mind, which transcends quantum mechanics, is the agent that collapses quantum states. D. Everett’s many-worlds proposal. E. The QBist idea that state vectors are not real, but rather only reflect the state of what an observer knows. F. Something else (describe).
A star with planets orbiting in a plane that is not face-on to our line-of-sight exhibit a Doppler effect due to ________
A) the light emitted by the moving planets B) the light reflecting from the moving planets C) the planet gravitationally tugging the star D) the planet's mass shifting the path of light from the star
Norma releases a bowling ball from rest; it rolls down a ramp with constant acceleration. After half a second it has traveled 0.40 m. How far has it traveled after two seconds?
a. 3.2 m c. 9.0 m b. 6.4 m d. 16 m
A flywheel rotating at 640 rev/min is brought to rest with a uniform deceleration of 2.0 rad/s2. How many revolutions does it make before coming to rest?
A) 320 B) 17 C) 160 D) 360 E) 180