An is holding an ice cube. What causes the ice to melt? A. Thermal energy from the ice is transferred to the air.
B. Thermal energy from Jan’s hand is transferred to the ice.
C. The air absorbs thermal energy from Jan’s hand.
D. Jan’s hand absorbs thermal energy from the ice.

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.