Two objects that are made of the same substance but are at different temperatures are placed in thermal contact and isolated for their surroundings. object a is far more massive than object b .

Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?

Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.

Cho is making a bar graph showing the amount of money spent on health care between 1999 and 2005. the dependent variable is the: a: money spent b: year c: number of patients