Askateboarder is standing at the top of a tall ramp waiting to begin a trip. the skateboarder has
a)
kinetic energy only.
eliminate
b)
potential energy only.
c)
both kinetic and potential energy.
d)
neither kinetic or potential energy.

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Hydrogen and helium are both members of?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?