CFC, Freon, and aerosols are becoming less commonly used because they

A) cause acid rain.

B) harm the ozone layer.

C) have radioactive waste.

D) cause Alzheimer's disease.

Which level of government has the authority to raise an army

The force of 100N acts on a body moving with constant velocity of 20m/s on a floor in a strainght line. what is the force of friction between the body and the floor?

Why when objects become charged it is electrons that are transferred from one object to another rather than protons

Matter is the ability to cause change. true or false.

Two linear polarizing filters are placed one behind the other, so that their transmission directions are parallel to one another. A beam of unpolarized light of intensity?0 is directed at the two filters.

If the mass of an object is 84g and the volume is 12cm3 what is the density

Describe one example of competiton of tropical dry forest

What is the center of a tornado called A. the eye B. The center C. The middle road D. The vortex

Is it legal in Florida for a math teacher forces the kids to do push ups?

Acceleration is best defined as the rate of change of blank of an object