The presence of vesicular basalts among the lunar rock samples shows that
a. the lunar surface was fragmented by meteorite impacts.
b. volcanism did not occur on the moon.
c. the crust must have been made of anorthosite.
d. molten lava once flowed over the lunar surface.
e. the moon was once hit by a very large meteorite.
D
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A certain crate sits on a rough floor. You find that you have to apply a horizontal force of 200 N to get the crate moving. If you put some massive objects in the crate so that its mass is doubled, how much force does it take to get the crate moving now?
A. Still 200 N B. 400 N C. 800 N D. It depends (specify)
Suppose that an object is moving with a constant velocity. Make a statement concerning its acceleration
A) The acceleration must be constantly increasing. B) The acceleration must be constantly decreasing. C) The acceleration must be a constant non-zero value. D) The acceleration must be equal to zero. E) A statement cannot be made without additional information.
If I1 goes to the right through R1, I2 goes to the right through R2, and I3 goes to the right through R3, what is the resulting equation resulting from applying Kirchhoff’s loop rule for a clockwise loop around the perimeter of the circuit?
a.
8.0 V + I1R1 + I3R3 = 0
b.
8.0 V + I1R1 – I3R3 = 0
c.
8.0 V – I1R1 + I3R3 = 0
d.
–8.0 V + I1R1 + I3R3 = 0
Electron A is fired horizontally with speed 1.00 Mm/s into a region where a vertical magnetic field exists. Electron B is fired along the same path with speed 2.00 Mm/s. Which electron has a path that curves more sharply?
1.A does. 2.B does. 3.The particles follow the same curved path. 4.The particles continue to go straight.