On an ice rink, two skaters of equal mass grab hands and spin in a mutual circle once every 2.9 s .If we assume their arms are each 0.85 m long and their individual masses are 61.0 kg , how hard are they pulling on one another?Express your answer to two significant figures and include the appropriate units.

Jason is a body builder. despite being more fit, he weighs more than his brother ryan, who is the same height. which is a possible reason? a. jason has more muscle mass than ryan does. b. jason has more body fat than ryan does. c. jason has more muscle mass and body fat than ryan does d. jason has less body fat than ryan does.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Sound is a disturbance that travels through a medium as a