A13-kg sled is moving at a speed of 3.0m/s. at which of the following speeds will the sled have twice as much kinetic energy

sorry about the capitals letters

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.

How have the competing explanations' experiments on atoms affected the development of the atomic model?

=force × distance a. work b. velocity c. pressure d. momentum