A heat engine having an efficiency of 0.20 takes in 2000 J of energy from the hot reservoir in one cycle. In the same time, how much work will it perform?
A. 0 J
B. 33,333 J
C. 400 J
D. 1000 J
E. 120 J
Answer: C
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A) estimates of orbits and masses B) complete composition C) precise masses D) All of the above E) None of the above
One ______________ is defined as the distance to a star when the star exhibits a parallax of one second of arc
Fill in the blank(s) with correct word
An RL series circuit has the following components: 5.0-mH coil, 4.8-W resistor, 12-V battery, ammeter, and switch. After the switch is closed for a long time, find the final value of the current
a. 12 A c. 2.5 A b. 2400 A d. 58 A
Potential of Point-Charges: Three point charges, -2.00 ?C, +4.00 ?C, and +6.00 ?C, are located along the x-axis as shown in the figure. What is the electric potential (relative to infinity) at point P due to these charges? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. -307 kV B. +307 k V C. -154 kV D. +154 kV E. 0.00 kV