What makes the Crab pulsar somewhat unusual among pulsars in general?
A) It is the most intense source of X-rays in the sky.
B) It is the fastest pulsar known.
C) It is the oldest pulsar observed.
D) Its period is not regular like other pulsars.
E) It is rather bright at visible wavelengths.
E
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Kirchhoff's Rules: For the circuit shown in the figure, R1 = 18 ?, R2 = 44 ?, R3 = 33 ?, R4 = 14 ?, R5 = 12 ?, V1 = 18 V, V2 = 12 V, and the batteries are ideal. Determine I1 and I2.
What will be an ideal response?
A heat engine with an efficiency of 30.0% performs 2500 J of work. How much heat is discharged to the lower temperature reservoir?
A) 5830 J B) 8330 J C) 750 J D) 1350 J E) 7080 J
Two unknown resistors A and B are connected together. When they are connected in series their combined resistance is 15 ?. When they are connected in parallel, their combined resistance is 3.3 ?. What are the resistances of A and B?
A) 15 ? and 5 ? B) 5 ? and 10 ? C) 2.5 ? and 5 ? D) 32? and 20 ? E) 10 ? and 30?
Muller wears a wristwatch with tritium in the watch hands because
A. he is not worried about radioactivity B. tritium is not radioactive C. the levels of radiation that emerge are safe D. no radiation emerges from the watch hands