D) If P is lowered through a distance of 30cm when W is raised by a distance of 10cm i) Calculate the velocity ratio of the machine

Which branches of natural science include the study of an organism that lived 10 million years ago

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.