Newton's law of gravitation can be used to show that if an object weighs pounds on the surface of the earth, then its weight at a distance x from the center of the earth is w(x)= (for x≥ where =3960 miles is the radius of the earth. estimate the altitude at which a 120- lb pilot would weigh 119.5 lb. (use decimal notation. give your answer to two decimal places.)

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?