a 30kg child who is running at 4m/s jumps onto a stationary 10kg skateboard. what is the approximate speed of the child and skateboard

How can you use fossils and geologic features to interpret the relative ages of rock layers

As you watch the video, notice that the size of the tidal bulges varies with the Moon's phase, which depends on its orbital position relative to the Sun. Which of the following statement (s) accurately describe (s) this variation?

How much work is done when you push a crate horizontally with 130 N across a 11- m factory floor?

A ball is thrown at an angle of 45° to the ground. if the ball lands 87 m away, what was the initial speed of the ball? (round your answer to the nearest whole number. use g â 9.8 m/s2.)

What is the pH scale used for? a. Measures hydroxide ion concentration (strength of the acid or base) b. Measures hydronium ion concentration (strength of the acid or base)

This gland lets your body use energy

Question: Suppose you see a crescent Moon; how much of the Moon's entire surface (the full globe of the Moon) is in daylight?

What is the maximum number of atoms that can be bonded in an ionic bond

You dribble a basketball while walking on a basketball court list the pairs of action reaction forces in this situation

Which method is used to counteract the effects of erosion caused by water