The potential energy of a ball on the ground is zero. If the ball is now in the bottom of a hole, its potential energy is   nonexistent. the same as it was on the surface. negative. zero.

Which thermodynamic law says that you cannot convert 100 percent of a heat source into mechanical energy?   first law of thermodynamics second law of thermodynamics third law of thermodynamics law of increasing entropy

Your body judges temperature   very poorly, sensing only heat flow. within 5°C of the actual temperature. better than most thermometers. None of these.

The amount of energy produced by power-generating dams is   increasing, as more of this clean, non-polluting resource is used. increasing, as more renewable resources are used. decreasing, as more energy is used but new dams are not being built. decreasing, as old dams are destroyed for environmental reasons.

Plants convert radiant energy from the sun into chemical energy by a process called photosynthesis. 

You do more work on yourself when you run up the stairs than when you walk slowly.  

The watt (W) is a unit of   work. electrical energy. power. force.

An object that falls twice as far will be moving twice as fast when it hits the ground.  

In a eukaryotic cell, transcription occurs in the _____  and translation occurs in the _____.

A _____ mutation does not change the amino acid sequence of a protein.