The peak of the radiation curve of a blackbody moves toward larger wavelength as its temperature increases
Indicate whether the statement is true or false
F
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The speed of a wave pulse on a string depends on the tension, F, in the string and the mass per unit length, ?, of the string
Tension has SI units of and the mass per unit length has SI units of What combination of F and ? must the speed of the wave be proportional to? A) F / ? B) ? / F C) D) E)
In a LRC circuit, a second capacitor is connected in series with the capacitor previously in the circuit. What is the effect of this change on the impedance of the circuit?
A) It increases. B) It decreases. C) It does not change. D) It increases for frequencies below resonance and decreases for frequencies above resonance. E) It decreases for frequencies below resonance and increases for frequencies above resonance.
Polarization: The following items are positioned in sequence: A source of a beam of natural light of intensity I0, three ideal polarizers A, B, and C; and an observer. Polarizer axis angles are measured clockwise from the vertical, as viewed by the observer. The axis angle of polarizer A is set at 0° (vertical), and the axis angle of polarizer C is set at 50°. Polarizer B is set so that the beam intensity is zero at the observer. What are the two possible axis angle settings (less than 180°) of polarizer B?
A. 40° and 90° B. 40° and 130° C. 40° and 140° D. 90° and 130° E. 90° and 140°
We know that galaxies exist in the zone of avoidance because we can detect them using radio telescopes.
Answer the following statement true (T) or false (F)