A runner has an initial velocity of 4 meters per second. After 20 seconds, the runner's velocity is 6 meters per second. Which is the runner's acceleration?

What is the smallest particle representing hydrogen peroxide? A. a molecule B. an oxygen atom C. diatomic oxygen D. a hydrogen atom

A helicopter is rising straight up. the height of a helicopter above the ground is given by h = 3.50t3, where h is in meters and t is in seconds. (so that equation's form tells us the helicopter is clearly not in freefall ...

A car hits another and the two bumpers lock together during the collision. is this an elastic or inelastic collision?

If a person is in front of a smooth surface from which a sound is reflected, the person would hear a sound that a. seems to come from behind the surface. b. has a higher intensity than the sound produced by the source. c.

A water pump pumps 3 kg of water every second from the bottom of a well to the top of the well 50 m above. If the pump uses 2000 W of electrical power to accomplish the task, what is the efficiency of the pump

Ways that charges can be transferred

A cricketer can throw a ball to a maximum horizontal distance of 100m. How much high above the ground can he throw same ball

What is the relationship between the slope of the position graph of an object and its velocity?

Differeniate between thermal energy and heat

The term that describes the time when the sun's are directly over the equator is: