Acomet of mass m is in an elliptical orbit around a star of mass m. at the closest point of its orbit, point p, the comet is a distance d from the center of the star, and at the farthest point, point a, the distance is 3d. you may disregard the presence of all other celestial bodies. derive an expression for the change in the comet’s kinetic energy as it moves from point p to point a, in terms of system parameters and constants.

(science)study the following ocean currents map. an ocean currents map is shown. on the map the locations for san diego, california and savannah, georgia are marked. there is a looping current from the north past san diego and a looping current from the south near savannah which statement is most likely correct about the average temperatures in san diego, california as compared to savannah, georgia? it is higher in savannah because of the cool ocean currents from the south. it is higher in savannah because of the warm ocean currents from the north. it is lower in san diego because of the warm ocean currents from the south. it is lower in san diego because of the cool ocean currents from the north.

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?