Why do my teeth hurt when i jump on a trampoline? i'll start and then my teeth just start killing me! ? science people, halp

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

Three resistance 4,4 and 6 ohms are joined in the series.the total resistance will be

Suppose two stars are located in region a of the h-r diagram shown in the figure below. star c appears much dimmer than star y as seen from earth. which star can be inferred to be nearer to earth and how do you know?