Two planets have the same surface gravity, but planet b has twice the mass of planet a. if planet a has radius r, what is the radius of planet b?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero