A 2.0 kg ball is dropped from a height of 20 m onto a soft surface and rebounds to a height of 5.0 m . What is the magnitude of the impulse exerted on the ball by the floor? A: 10 NS
B: 20 NS
C: 40 NS
D: 60NS
E: 100 NS

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

Asemipermeable membrane is placed between the following solutions. which solution will decrease in volume? solution a: 1.4% (m/v) starch solution b: 7.62% (m/v) starch