A 60Kg man standing on stationary 40kg boat throws a 0.2kg ball with a velocity of 4m/s. Assuming that there's no friction between the man and the boat, what's the speed of the boat after the man throws the ball?

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

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.