You throw a baseball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down
A) The work is positive on the way up and positive on the way down.
B) The work is positive on the way up and negative on the way down.
C) The work is negative on the way up and positive on the way down.
D) The work is negative on the way up and on the way down because gravity is always downward.
C
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In general, as the yield strength of a given alloy increases, the ductility _________.
Fill in the blank(s) with the appropriate word(s).
Which characteristic is NOT shared by the Moon and Mercury?
a. heavily cratered surface b. negligible atmosphere c. rotations altered by tides d. dense metallic core e. geologically inactive
A solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. If this solenoid carries a current of 12 A, what is the magnitude of the magnetic field at the center of the solenoid?
A) 16 mT B) 4.9 mT C) 15 mT D) 6.0 mT E) 9.0 mT
A capacitor in a single-loop RC circuit is charged to 85% of its final potential difference in 2.4 s. What is the time constant for this circuit?
a. 1.5 s b. 1.3 s c. 1.7 s d. 1.9 s e. 2.9 s