The total radiant power emitted by a blackbody is proportional to its _________________ raised to the fourth power
Fill in the blank(s) with correct word
temperature
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Which of the waves below has the shortest wavelength?
a. gamma rays b. X-rays c. visible light d. infrared e. radio
A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 ? and L = 10.0 mH. The impedance is
a. 3.77 ?. b. 9.26 ?. c. 10.0 ?. d. 10.7 ?. e. 13.8 ?.
In an experiment, a student brings up the rotational speed of a piece of laboratory apparatus to 30.0 rpm
She then allows the apparatus to slow down uniformly on its own, and counts 240 revolutions before the apparatus comes to a stop. The moment of inertia of the apparatus is known to be 0.0850 kg?m2. What is the magnitude of the retarding torque on the apparatus? A) 0.0425 N ? m B) 0.159 N ? m C) 0.0787 N ? m D) 0.000278 N ? m E) 0.0000136 N ? m
A string with a mass per length of 2.00 gm/m is stretched with a force of 120 N between two points that are 0.400 m apart. The fundamental frequency of the stretched string is in tune with the frequency of the second mode of an organ pipe filled with air and open at both ends. The velocity of sound in air at 0
is 331 m/s. If the temperature of the air decreases by 20
then what is the length of the organ pipe?
A. 75.0 cm B. 100 cm C. 125 cm D. 150 cm E. 175 cm