How did the lunar maria form?
A) Large impacts fractured the Moon's lithosphere, allowing lava to fill the impact basins.
B) The early bombardment created heat that melted the lunar surface in the regions of the maria.
C) Volatiles escaping from the Moon's interior heated and eroded the surface in the regions of the maria.
D) The giant impact that created the Moon left smooth areas that we call the maria.
E) The maria are the result of gradual erosion by micrometeorites striking the Moon.
A
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An 80-g particle moving with an initial speed of 50 m/s in the positive x direction strikes and sticks to a 60-g particle moving 50 m/s in the positive y direction. How much kinetic energy is lost in this collision?
a. 96 J b. 89 J c. 175 J d. 86 J e. 110 J
Since the mass of an object is the same for all observers, it is a relativistically ____________ quantity
Fill in the blank(s) with correct word
How are the particles in the elementary particle zoo classified in order to relate them effectively?
a. By particle size. b. By charge. c. By which force the particles participate in. d. By mass. e. By location.
Weight and g: Two planets have the same surface gravity, but planet B has twice the radius of planet A. If planet A has mass m, what is the mass of planet B?
A. m/
B. m
C. m
D. 4m
E. m/4