A skateboarder on a half-pipe changes his velocity from 6.0 m/s forwards to 4.0 m/s backward in 5.0 s. What is the acceleration of the skateboarder?

Protons has a charge of and is located in the of the atom

A cannon fires a cannonball. Explain how the cannonball gains kinetic energy. A. The sound of the explosion propels the cannonball. B. The thermal energy of the explosion propels the cannonball. C.

The sweeping second hand on your wall clock is 16 cm long. Assume the second hand moves smoothly. Part A What is the rotational speed of the second hand? Express your answer in radians per second to two significant figures.

A train is accelerating at a rate of 2 m/s. If its initial velocity is 20 m/s, what is its velocity after 30 seconds? Given: Equation: Plug in: Answer:

Which equations represent the relationship between wavelength and frequency for a sound wave? Check all that apply. v = lambdaf A = vf f = v A = StartFraction v over f EndFraction. A = StartFraction f over v EndFraction.

A hurricane in the Gulf of Mexico to 15 hours to travel 360 kilometers. What is the average speed of this hurricane in kilometers per hour?

Which organization functions to privide clinics and surgeries i developing nations

What role do convection currents play in oceans and the atmosphere?

What causes density currents to form in the mediterranean sea? a. condensation b. evaporation c. transpiration d. upwelling

How long does it take a car to travel 450 km at 75 km/hr