Which of the following best defines absolute threshold?
a. the presence of stimulus for detection.
b. the absence of stimulus from detection.
c. the weakest amount of stimulus one can detect.
d. the greatest amount of stimulus one can detect.

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.

Which best represents the law of conservation of mass ?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?