What are two sources from which minerals crystallize?
What will be an ideal response?
magma and water solutions
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A parallel plate capacitor has a paper dielectric having dielectric strength 8.0 kV/mm and dielectric constant 3.0. The plate area is 3000 cm2 and the plate separation is 0.50 mm. What is the highest voltage that can be applied to this capacitor?
A. 15 V
B. 
C. 
D. 
E. 
Which type of spacecraft does NOT need to carry any fuel?
A) nuclear rockets B) ion engines C) solar sails D) chemical rockets
As a huge rotating cloud of particles in space gravitate together forming an increasingly dense ball, it shrinks in size and
A) rotates slower. B) rotates at the same speed. C) rotates faster. D) cannot rotate.
When throwing a ball straight up, which of the following is true about its velocity and acceleration at the highest point in its path?
A. both v = 0 and a = 0 B. v ? 0, a = 0 C. v = 0, a ? 0 D. v ? 0, a ? 0 E. not really sure