Ablock of wood weighing 25 n is subrnerged under water. if the net force on the wood is 5 n upward, how much buoyant force is acting on the wood?
a) 30 n upward
b) 20 n upward
c) 5 n upward
d) 25 n downward

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

What causes the formation of ocean currents?