A block with a weight of 20 N sits on a table. How much force does the table exert on the block?
10 N
40 N
0 N
20 N

In a system, when potential energy decreases, then entropy also decreases. true false

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

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?