Lightning is created when charges flow rapidly from

a. ground to cloud.

b. cloud to ground.

c. cloud to cloud.

d. all of these.'

Which best describes thermal energy? a. It is the difference between internal energies of two or more substances. b. It is the sum of internal energies of two or more substances. c.

Which one of the following polarizations of light is impossible for mass less photons? a. Transverse b. Circular c. Longitudinal d. Elliptical

How many cars can fit in a football field?

Why is a blob of putty inelastic

By which method does heat travel from the sun to Earth? A. Conduction B. Convection C. Evaporation D. Radiation

What is the kind of energy that comes from movement?

The average kinetic energy of 1 mole of a gas at 273 degrees Celsius is: 6.81 x 103 J 3.40 x 103 J 1.51 x 103 J 6.72 x 101 J

Which one of the following crystal structures has the fewest slip directions and therefore the metals with this structure are generally more difficult to deform at room temperature? a. BCC b. FCC c. HCP d. BCT

To rid the body of wastes, including excess water and salts" is the purpose of what human body system? A) Digestive B) Excretory C) Skeletal D) Nervous

What's the transmission of heat requiring the movement of a liquid or a gas is?