Ahand-held video game is powered by batteries. after playing the game for several minutes, a student notices that the game feels warm. which of the following is the most likely explanation for this observation? a. the game creates energy when it is turned on. b. some of the chemical energy from the batteries is converted into heat energy. c. some of the energy from the batteries is changed into the force of friction. d. the game creates heat energy from the person playing it.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

The ozone hole appears in antarctica during

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.