a car travels 180 miles north in 3 hours. what is the average velocity? (lesson 2.01) show your work and include units. average velocity = distance/time.

What is the frequency of a light wave with a wavelength of 620nm

Explain the consequences of this addiction to the brain tissue

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)