The acceleration due to gravity at the surface of Planet X is 10 m/s2 . What is the acceleration due to gravity at an altitude of 4000 km above the surface of this planet?
a. 10 m/s2
c. 4.4 m/s2
b. 8.0 m/s2
d. More information is needed.
D
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An electric field perpendicular to a magnetic field is used as a velocity selector for Li+ions, selecting the velocity v1. Next, Li++ions are sent through the same velocity selector, selecting velocity v2. If neither the electric nor magnetic fields have changed between the two processes, how do v1 and v2 compare?
a. 
b. 
c. 
d. 
e. 
Rest Energy
A. is always the same for all objects B. depends on the velocity at which an object moves C. depends on the mass of an object D. depends on the acceleration at which an object moves
Your largest personal contribution to global warming in a year comes from ________
a. use of freon propellants b. use of air conditioners in your home c. driving your car d. cutting down trees e. burning natural gas for home heating.
The electric flux through the two adjacent spherical surfaces shown below is known to be the same
It is also known that there is no charge inside either spherical surface. We can conclude that
a.
there is no electric field present in this region of space.
b.
there is a constant E field present in this region of space.
c.
the electric flux has a constant value of zero.
d.
any of the above may be correct.
e.
only (a) and (b) above may be correct.