4. A weight trainer holds a 80.0 kg barbell at a shoulder height of 1.85m and then sets it down on a stand that is 0.95 m tall. When on the stand:
a. What is their gravitational potential energy relative to the ground?
b. What is the barbell's gravitational potential energy relative to the shoulder height?
c. What is their gravitational potential energy relative to the stand height?

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.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.