Aplanet with the mass mp = 2 x 1026 kg orbits a massive star with mass 10 times the solar mass. at perihelion, it has a speed of 1.4 x 103 m/s and is 1.0 x 1015 m from the star. the orbital radius increases to 2.77 x 1015 m at aphelion. note: ms = 2 x 1030 kg a) what is the planet’s speed at aphelion? b) what is the period of the orbit? c) what is the energy of the orbit?

You can decrease the resistance of a length of wire by

Using proper grammar, spelling, and punctuation, write at least one 5 sentence paragraph describing 3 ways we use the elements of the electromagnetic spectrum (ems) in our everyday lives.

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?