a ball is thrown horizontally from the roof of a building 45.0 m tall and lands 24.0 m from the base. What was the ball's initial speed?

Which of the following changes would decrease the coefficient of friction needed for this ride?

Monochromatic light strikes a metal surface and electrons are ejected from the metal. if the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?

A car travels 290 m over a time of 5s. What was the speed of the car?

The most serious effect of radiation on humans is A. it causes us to melt B. the damage it can cause to our DNA C. there are no serious effects of radiation on humans D. the damage it can cause to our ski

A body of volume 100cc immersed completely in water contained in a jar. The weight of water and jar before immersion of the body was 700gm. After immersion, what will be the weight of water and jar?

What is always true of a single-displacement reaction?

Mrs Garcia traveled 15 km in 1 hour. What was her average velocity in km/s?

Contrast the nucleus and electron in a cloud

For saving lives, what is the most important safely feature on a car a. air bag b. safely belt c. anti-lock brakes

An 1700 kg car is moving to the right at a constant speed of 1.50 m/s. (a) what is the net force on the car