1. acceleration is best defined as the rate of change of of an object. a. position b. force c. speed d. velocity 2. which of the following describes acceleration? a. s/m b. m/s c. m/s2 d. m2 3. which of the following is the main difference between speed and velocity? a. speed has direction and velocity b. speed is measured over time c. velocity has both speed and direction d. speed is constant

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these