An apple in a tree has a gravitational potential energy of 17.5 J and a mass of 0.36 kg. About how high from the ground is the apple?

Can anybody me with this? ? (picture included.)

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.