:which of the following is true about comets in our solar system? a. being mini-stars, they are made of gas. b. they were discovered in the 17th century. c. they take roughly the same amount of time to orbit the sun. d. they all orbit the sun due to the sun’s gravity.

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

What’s #16 asking me and how do i solve it?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?