What is the wavelength of peak emission for a black body at 37C? (c = 3.0 108 m/s, Wien displacement law constant is 2.9 10-3 m K, = 5.67 10-8 W/m2 K4 )
A) 29 m B) 94 m C) 7.8 m D) 9.4 m E) 78 m
Question 2
An LRC series circuit has R = 15.0 , L = 25.0 mH, and C = 30.0 F. The circuit is connected to a 120-V (rms) ac source with frequency 200 Hz.
(a) What is the impedance of the circuit?
(b) What is the rms current in the circuit?
(c) What is the rms voltage across the resistor?
(d) What is the rms voltage across the inductor?
(e) What is the rms voltage across the capacitor?