An object of mass m rests on a flat table. The earth pulls on this object with a force of magnitude mg. What is the reaction force to this pull?
A) The table pushing up on the object with force mg.
B) The object pushing down on the table with force mg.
C) The table pushing down on the floor with force mg.
D) The object pulling upward on the Earth with force mg.
E) The table pulling upward on the Earth with force mg.
Question 2
Jill does twice as much work as Jack does and in half the time. Jill's power output is
A) the same as Jack's power output.
B) one-fourth as much as Jack's power output.
C) one-half as much as Jack's power output.
D) twice Jack's power output.
E) four times Jack's power output.
Ionic bonding in table salt (NaCl)
Table Salt
Planets, Earth and Moon
Newest Periodic Table
Earth’s Climate System
Escape Speed from Earth