A stone is thrown vertically upward. At the top of its vertical path the force acting on it is
A) zero.
B) only the force due to gravity.
C) due to air resistance.
D) both due to gravity and air resistance.
Answer: B
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Jupiter is more massive than all the other planets put together.
Answer the following statement true (T) or false (F)
What is a chemical equation?
A) It is a shorthand notation for illustrating a chemical reaction. B) It is the sum of the masses of the products and reactants. C) It is the chemical combination of equal numbers of reactants and products. D) It is a picture of the atoms undergoing a chemical equalization. E) It is any type of reaction that takes place at the equator.
The electric field at the surface of a positively charged conductor has a direction characterized by which of the following?
a. tangent to the surface b. perpendicular inward toward the charge c. at a 45° angle to the surface d. perpendicular outward and away from the charge
Consider the standing wave on a guitar string and the sound wave generated by the string as a result of this vibration. What do these two waves have in common? (There may be more than one correct choice.)
A) They have the same wavelength. B) They have the same speed. C) They have the same frequency. D) They have the same amplitude. E) They have the same period.