Brad spends four hours watching football on television and does 1090 J of work. In the process, his internal energy decreases by 2990 J. Determine the value of Q, including the algebraic. a. +4080 J
b. –4080 J
c. –1900 J
d. +1900 J
e. –2990 J

Which situation will produce the greatest change of momentum

What is the difference between mass density and weight density?

An electron moving at 5.06 103 m/s in a 1.23 t magnetic field experiences a magnetic force of 1.40 10-16 n. what angle does the velocity of the electron make with the magnetic field? there are two answers between 0° and 180°. (enter your answers from smallest to largest.)