a cannonball is fired to the west at an angle of 60 degrees above the horizontal, with a velocity of 20 m/s. what is the x-component of this velocity?

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?