Plutonic rocks subjected to high temperature and pressure transform by
A) recrystallization of existing mineral grains.
B) deformation of mineral grains.
C) melting down of existing minerals.
D) any of these
Answer: D
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Tides are caused because different parts of the earth's oceans are at different distances from the moon
Indicate whether the statement is true or false
The ratio of the energy of a photon to its frequency is
A) ?. B) Planck's constant. C) photon speed. D) photon wavelength. E) unknown.
How many lines in a grating must be illuminated to obtain a resolving power of 400 in a fourth-order spectrum?
a. 1,600 b. 100 c. 400 d. 10 e. 40
Answer the following statement(s) true (T) or false (F)
1. An inertial clock present at two events always measures a shorter time than a pair of synchronized clocks in any inertial reference frame would register between the same two events (as long as the events don’t occur at the same place in that frame). 2. Consider a train moving at a speed of 0.5 relative to the ground. A light in one of its windows blinks repeatedly. An observer on the ground will necessarily see (not observe) those blinks to be separated by a larger time interval than a person on the train would.