A 100-kg person sits on a 5-kg bicycle. The force that the person exerts on the bicycle is borne equally by the two wheels of the bicycle. The tires are 2.0 cm wide and are inflated to a gauge pressure of 8.0 × 105 Pa
What length of each tire is in contact with the ground? A) 1.6 cm
B) 1.8 cm
C) 3.2 cm
D) 2.4 cm
E) 6.4 cm
C
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Define nuclear fusion
What will be an ideal response?
A series RC circuit has a time constant of 0.900 s. The battery has an emf of 24.0 V, and the maximum current in the circuit is 0.500 mA.What is the charge stored in the capacitor 2.00 s after the switch is closed?
a. 401 ?C b. 18.8 ?C c. 108 ?C d. 450 ?C
A compound microscope has three possible objective lenses and two eyepiece lenses For maximum angular magnification, the objective (f0) and eyepiece (fe) should be chosen such that
A. f0 and fe are both the largest available. B. f0 and fe are both the smallest available. C. f0 is the largest available: fe is the smallest available. D. f0 is the is the smallest available: fe is the largest available.
A solid state pulsed laser has an energy of 400 mJ per pulse. If its wavelength is 1.06 × 10^-6 m, how many photons are in each pulse?
a. 2 × 10^25 b. 2 × 10^21 c. 3 × 10^18 d. 6 × 10^38 e. 2 × 10^18