Energy and Momentum: In a police rifle test, a 15-g bullet traveling 213 m/s in a vertical direction suddenly buries itself in a 2.4-kg block of wood at rest directly above it. As a result, the bullet-block combination moves vertically upward.(a) Determine the velocity of the bullet-block combination just after the impact.(b) Determine the maximum height reached by the bullet/block combination.(c) Is kinetic energy conserved in this collision?
What will be an ideal response?
(a) 1.3 m/s (b) 0.089 m (c) No, this is an inelastic collision.
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Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32.0°, what is the total number of maxima can be seen?
A) 5 B) 7 C) 10 D) 11 E) 8
Which of the following is the most basic definition of a greenhouse gas?
A) a gas that reflects a lot of sunlight B) a gas that keeps warms air from rising, and therefore warms the surface C) a gas that absorbs infrared light D) a gas that makes a planet much hotter than it would be otherwise, even in small amounts
A rock sample contains 1/4 micrograms of the parent radioactive isotope K-40 and 3/4 micrograms of its daughter isotope Ar-40. If the half-life of this decay is 1.25 billion years, how old is this rock?
A) 5.00 billion years B) 3.75 billion years C) 1.25 billion years D) 2.50 billion years
According to general relativity, it is impossible to distinguish between an accelerated frame of reference and ________.
What will be an ideal response?