Which of the following statements is true? a. animals add water vapor to the air through respiration. b. plants add water vapor to the air through photosynthesis. c. both plants and animals can make protein using nitrogen compounds. d. automobiles are the leading cause of acid rain.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

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.

As the distance from a magnet increases, what happens to the magnet force?