A car has a mass of 850 kg. By pushing on the car, Evan increases its speed from 3.5 m/s to 5 m/s. What impulse did Evan apply to the car?

A. 4250 kg•m/s
B. 1275 kg•m/s
C. 850 kg•m/s
D. 2975 kg•m/s

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Explain what happens at the saturation point when adding salt to water at room temperature.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false