When you vigorously shake a can of chicken broth, you
A) are doing work on the broth.
B) increase the temperature of the broth.
C) both of these
D) neither of these
Answer: C
You might also like to view...
Stars in the same constellation
a. probably formed at the same time. b. must be part of the same cluster of stars in space. c. must have been discovered at about the same time at the same location in space. d. may actually be very different distances away from the observer and from each other.
A 10.0-kg picture is held in place by two wires, the first one hanging at 50.0° to the left of the vertical and the second one at 45.0° to the right of the vertical. What is the tension force that the first wire exerts on the picture?
A) 69.6 N B) 50.8 N C) 98.1 N D) 69.4 N E) 23.8 N
Fred swings a sheet of copper in pendulum fashion between the poles of a strong magnet. The sheet slows in entering the magnetic field because the field
A) induces swirling currents in the copper and accompanying magnetic fields that resist motion. B) experiences both air and magnetic friction. C) is repelled by free electrons in the copper. D) none of the above
A projectile is launched vertically upward at 40 m/s. If air resistance is negligible, its speed upon returning to its starting point is
1) less than 40 m/s. 2) 40 m/s. 3) more than 40 m/s. All along the ball's trajectory, its acceleration is 4) g downward. 5) g at an angle. 6) zero. If air resistance does affect motion, then the ball's speed upon returning to its starting point is 7) less than 50 m/s. 8) 50 m/s. 9) more than 50 m/s.