Zach, whose mass is 90 kg, is in an elevator descending at 12 m/s. the elevator takes 3.0 s to brake to a stop at the first floor. part a what is zach's apparent weight before the elevator starts braking?

In which part of the ear is the sound wave converted into an electrical impulse? A. at the eardrum, between the outer and middle ear B. in the outer ear C. in the middle ear D. in the inner ear

Each croquet ball in a set has a mass of 0.50 kg. the green ball travels at 10.5 m/s and strikes a stationary red ball. if the green ball stops moving, what is the final speed of the red ball after the collision?

Cheetahs the worlds fastest land animals can run up to about 125km/h. a cheetah chasing an impala runs 32m [N], then suddenly turns and runs 46m [W] before lunging at the impala. the entire motion takes only 2.7seconds.

As a substance condenses, its temperature does not change. How does the potential energy of the molecules of the substance change as a result of the heat release? What type of energy must decrease in order for the temperature to decrease

A 300-n force acts on a 25-kg the acceleration of the object is what

An airplanes flies 2220 miles in 3. What is it's average speed in miles per hour?

One bullet has twice the mass of the second bullet. if both are fired so that they have the same speed which had more kinetic energy?

An incident that is caused by sleep and also occurs during sleep is known as a

A person is strolling along a moving walkway at a constant velocity of + 1.00 m/s with respect tot he walkway, which moves at a constant velocity of + 0.50 m/s with respect to the ground.

When a propagule falls into the water, it displaces some water, which causes a small splash