A 120-V rms voltage at 1000 Hz is applied to a series RLC circuit with an equal value of inductive and capacitive reactance and a 200-? resistance. What is the impedance of this circuit?
A) 240 ? B) 120 ? C) 100 ? D) 0 ? E) 200 ?
E
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When a mixture of gases is placed in a container at a given temperature, the pressure in the container is equal to the sum of the pressures that the individual gases would exert if they separately occupied the entire container at the same temperature
. Given that air is basically a mixture of nitrogen, with a molecular weight of 28 g/mol, and oxygen, with a molecular weight of 32 g/mol, what must be the ratio of the mass of oxygen to the mass of nitrogen in air for air to have an effective molecular weight of 29? A) 8:21 B) 3:5 C) 5:7 D) 32:87 E) 3:7
A single slit forms a diffraction pattern with monochromatic light. The 4th minimum of the pattern occurs at an angle of 35° from the central maximum. How many bright bands are on each side of the central maximum?
A) 5 B) 4 C) 6 D) 7 E) 8
Which of the following best describes the image of a concave mirror when the object's distance from the mirror is less than the focal point distance?
a. real, inverted, and magnification greater than one b. virtual, upright, and magnification greater than one c. virtual, upright, and magnification less than one d. real, inverted, and magnification less than one
Find the work W done by the "ideal" heat engine.
