What does it mean when work is positive?

A. Velocity is greater than kinetic energy.

B. Kinetic energy is greater than velocity.

C. The environment did work on an object

D. an object did work on the environment

A roller coaster track is a good example of the law of conservation of energy. Use this law to explain these facts about a roller coaster track. a. The largest hill for a roller coaster track is the first hill on the track.

The principle of the photoelectric effect is: A) the electromagnetic theory of light B) the special theory of relativity C) the principle of superposition D) the quantum theory of radiation

Which sound waves in the electromagnetic spectrum are considered low energy waves

The ocular lenses of our microscopes in lab provide 10X magnification. If you are viewing cells with the 40X objective lens what would the total magnification be?

What are the three function of sugar in food mixture?

Which of the following determine an object's velocity? A. speed and direction B. direction and acceleration C. speed and mass D. speed, direction, and acceleration

The following statements regarding the exhaust gas recirculation (EGR) valve are all correct except: Low restriction exhaust systems will have no effect on EGR system operation. B.

A 10.0 V battery is connected to a 120-ohm resistor. Ignoring the internal resistance of the battery Calculate the power delivered to the resistor.

Hemoglobin (Hb) is the O2-carrying protein in our blood. Unlike myoglobin, it has four sites allowing it to bind up to four O2 molecules.

Why does the moon appear to change shape? A: It rotates and makes it own light B: It moves closer and farther away from the earth in a yearly pattern. C: It reflects sunlight as it revolves around the earth.