Which gesture suggests nervousness?

burying your head in your hands

leaning back in your chair

biting your nails

pounding your fists

True or false? A proton carries a positive charge.

Convert 305 meters to kilometers

When chemical bonds are broken, the process is A:endothermic B:exothermic C:conserved

Winter storms get their energy from the clash of two?

Consider a no-friction 5.0 kg skateboard on a 15 degree ramp. If a 45 kg teenager jumps on, what would be her acceleration down the ramp? __m/s^2

During a collision with another car, the occupants of a minivan initially travelling at 4.0 m/s come to a complete stop in 0.5 s. What was the acceleration of the occupants of the minivan? a) 8.0 m/s2 b) - 8.0 m/s2 c) 2.0 m/s2 d) - 2.0 m/s2

A system dissipates 12 J of heat into the surroundings; meanwhile, 28 J of work is done on the system.

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.

landslides and mudslides caused by lava flows are ___ deadly than the lava flow itself. a. more b. less