_____ refers to the ability of a telescope to reveal fine detail
A) Focal length
B) Magnifying power
C) Resolving power
D) Spherical aberration
C
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Alpha decay reduces the atomic and mass numbers respectively by how much?
A) 4, 2 B) 2, 2 C) 2, 4 D) 4, 4 E) 2, 6
How much power does a sphere with a radius of 10 cm radiate if is has an emissivity e = 1.0 and is kept at a temperature of 400 K? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4)
A) 60 W B) 70 W C) 180 W D) 210 W E) 360 W
A 2.0-?F capacitor in series with a 2.0-k? resistor is connected to a 60-Hz AC source. Calculate the impedance of the circuit.
A. 1500 ohms B. 1800 ohms C. 2100 ohms D. 2400 ohms E. 8600 ohms
A 400-g stainless steel tea kettle containing 500 g of water is on top of the stove. The portion of the tea kettle that is in contact with the heating element has an area of 0.090 m2 and is 2.0 mm thick
At a certain moment, the temperature of the water is 75°C, and it is rising at the rate of 3C° per minute. What is the difference in temperature between the inside and the outside of the bottom of the tea kettle? The thermal conductivity of stainless steel is 16.3 W/(m•K) and the specific heat is 448 J/(kg•K). A) 2.2°C B) 1.5°C C) 1.1°C D) 0.50°C E) 0.015°C