In a 3d gas of ultrarelativistic bosons, can bose einstein condensation occur at a finite (not zero) temperature. explain.

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.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?