Which of the following is a definite indicator of a chemical change?
A.
The shape of a substance is changed.
B.
A new substance is formed.
C.
A substance is converted from a liquid to a gas.
D.
The change in a substance is reversible.

The total amount of energy contained in an object

Four 5-gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. use the following specific heat capacity data to determine which block will increase its temperature the most.

Which statement is true about an object that is moving in a circular motion due to centripetal force, f, when the radius of its circular motion is doubled? the new force then becomes equal to 2f the new force then becomes equal to f the new force then becomes equal to f/2 the new force then becomes equal to f2 the new force then becomes equal to 1/f