In an LC circuit with an inductance of 40 mH and capacitance of 1.2 mF, the maximum charge on the capacitor is 45 mC during the oscillations which occur. What is the maximum energy stored by the inductor during the oscillations?
A)
1.7 mJ
B)
0.84 J
C)
0.84 mJ
D)
1.7 J
E)
1.125 mJ
B
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According to the quantum theory of radiation, when a vibrating charged particle emits radiation it
(a) continues vibrating without making any change in its state of vibration. (b) suddenly loses a portion of its charge. (c) suddenly turns into a photon. (d) instantaneously changes from a particle to a wave. (e) instantaneously changes from one state of vibration to a different state.
Density: The average density of blood is 1.06 × 103 kg/m3. If you donate a pint of blood to the Red Cross, how many grams of blood have you donated? (2.00 pt = 1.00 qt, 1.00 L = 1000 cm3, 1.00 qt = 0.947 L, and density is mass per unit volume.)
A. 502 g B. 0.502 g C. 5020 g D. 5.02 × 105 g E. 5.02 g
A Carnot engine operates between two reservoirs with unknown temperatures. If the Carnot engine operates at 67% efficiency, what is the ratio of the absolute temperatures of the reservoirs, Tc/Th?
A) 0.33 B) 0.0012 C) 0.0025 D) 0.67
The objective lens of a refracting astronomical telescope has a focal length of 60 cm, and the eyepiece has a focal length of 2.0 cm. How far apart should the lenses be placed in order to form a final image at infinity?
A) 60 cm B) 58 cm C) 76 cm D) 44 cm E) 62 cm