To increase the applied torque one can
A. Increase the force
B. Increase the lever arm by moving to the end of the lever
C. Increase the lever arm by applying the force
perpendicularly to the lever
D. All of the above
E. None of the above
D. All of the above
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Capacitors of values 6.00 mF and 9.00 mF are connected in series to a 30.0 V power supply. What is the resulting charge on the 6.00 mF capacitor?
A. 180 mC B. 270 mC C. 90.0 mC D. 108 mC E. 200 mC
What happens after the helium flash?
A) The core suddenly contracts. B) The star breaks apart in a violent explosion. C) The core stops fusing helium. D) The core quickly heats up and expands. E) The star starts to fuse helium in a shell outside the core.
Which statement about a single thin lens is correct?
A) A converging lens always produces a real inverted image. B) A diverging lens always produces a virtual inverted image. C) A converging lens sometimes produces a real upright image. D) A diverging lens always produces a virtual upright image. E) A diverging lens produces a virtual upright image only if the object is located between the lens and its focal point.
A 0.20-kg block rests on a frictionless, level surface and is attached to a horizontally aligned spring with a spring constant of 80 N/m. The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion. A frictional force of 0.3 N exists between the block and surface. What is the speed of the block when it passes through the equilibrium
point after being released from the 4.0-cm displacement point? a. 0.45 m/s c. 0.72 m/s b. 0.63 m/s d. 1.2 m/s