A squirrel runs at a speed of 9.9 m/s with 25 J of kinetic energy

What is the squirrels mass

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

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?