Emeline

Suppose that a grandfather clock (a simple pendulum) is running slowly. That is, the time it takes to complete each cycle is longer than it should be. Should one shorten or lengthen the pendulum to make the clock keep the correct time? Why?

Some researchers believe that the dinosaur Barosaurus held its head erect on a long neck, much as a giraffe does. If so, fossil remains indicate that its heart would have been about 13 m below its brain. Assume that the blood has the denisty of water, and...

A 7.40 lb rock sits on top of a 76.0 foot cliff. it is pushed off. What is the energy in Joules of the rock just before it hits the ground?