If a substance cannot be broken down chemically into smaller substances it is

A) An element

B) a compound

C) an atom

D) a molecule

A proton, moving west, enters a magnetic field of a certain strength. because of this magnetic field the proton curves upward. what is the direction of this magnetic field?

Jake walks 4m due north and then 3m due west to take a walk. The distance that jake walks is ___ m

A scientist's curiosity is a legitimate driving force of scientific endeavor

The amount of light entering the eye is regulated by the

Frying pans are good conductors of heat. A scientist developed four new materials to be used for making frying pans. He made rods of equal mass and length from each material.

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Static charge develops on a substance as it acquires or loses protons due to friction. a. True b. False

A milk truck carries milk with density 64.6 lb/ft3 in a horizontal cylindrical tank with diameter 12 ft. (a) Find the force exerted by the milk on one end of the tank when the tank is full. (Round your answer to the nearest integer.) lb

Which human activity contributes to air pollution

Cooler stars age much faster than hotter stars true or false