Use the Hertzsprung-russel diagram to determine which condition describes each star. Use the arrows to help you locate the stars. Procyon B Polaris
Vega
It is fusing hydrogen at its core.
It has lost its outer shell and retained only a hot core that is slowly losing its
brightness
Its temperature has decreased, but it is shining brighter than before.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?