If, instead of the correct formula for kinetic energy, we carelessly use the classical expression for kinetic energy for a particle moving at half the speed of light, by what magnitude percent will our calculation be in error? (c = 3.0 × 108 m/s)
A) 24%
B) 19%
C) 27%
D) 7%
E) 1%
B
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The increase in tensile and shear yield strength due to the strain hardening of metals is proportional to the dislocation density to the _________ power.
Fill in the blank(s) with the appropriate word(s).
The Sun's mass and volume are over a million times that of our Earth
Indicate whether the statement is true or false
An explosion occurs 34 km away. For sound that travels at 340 m/s, you'll hear the explosion in
A) 0.1 s. B) 1 s. C) 10 s. D) 20 s. E) more than 20 s.
Case 1: An electron is released from rest in a uniform electric field. Case 2: A proton is released from rest in a uniform electric field of the same magnitude as in case 1 . How does the electric potential energy of the charge-field system behave in these cases?
a. In case 1 the potential energy increases, but in case 2 it decreases. b. In both cases, the potential energy increases. c. In case 1 the potential energy decreases, but in case 2 it increases. d. In both cases, the potential energy decreases.