A 54 kg pilot flies a jet trainer in a half vertical loop of 1200 m radius so that the speed of the jet decreases at a constant rate. Knowing that the pilot's apparent weights at points A and C are NA = 1680 N and NC = 350N, respectively, determine the total force exerted on her by the seat of the jet trainer when the trainer is at point B.

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.

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

Energy can be transformed from one form to another. the diagram shows one such process. which energy transformation is represented in the diagram? nuclear to thermal and radiant nuclear to electrical and chemical chemical to nuclear and radiant chemical to electrical and nuclear