Author Question: According to Einstein's mass-energy relation, A) a heated object has slightly greater mass than ... (Read 104 times)

Davideckstein7 · **on:** Jul 29, 2018

According to Einstein's mass-energy relation,

A) a heated object has slightly greater mass than the same object when it was cooler.
B) a stretched rubber band has slightly greater mass than the same rubber band when unstretched.
C) Both of the above.
D) None of the above.

Question 2

A 3.0-kg and a 5.0-kg box rest side-by-side on a perfectly smooth, level floor. A horizontal force of 32 N is exerted on the 3.0-kg box pushing it against the 5.0-kg box, and, as a result, both boxes slide along the floor.

How hard do the two boxes push against each other? A) 12 N
B) 20 N
C) 24 N
D) 32 N
E) 0 N