Aball is thrown horizontally from the top of a tall cliff. neglecting air drag, what vertical distance will the ball have fallen after 3 seconds?

What is the frequency of a light wave with a wavelength of 620nm

Abaseball picther can throw a ball at about 90 miles per hour, v = 40 m/s, on solid rock ground. we now put him into space. when he throws the ball, which weighs mb = 0.15 kg moves away from himat the same speed. how long does it take the ball thrown in space to travel the 30 meters to the batter? he weighs mp = 100kg

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds