Ten coulombs of charge start from the negative terminal of a battery, flow through the battery and then leave the positive terminal through a wire, flow through a resistor, and then return to the starting point on this closed circuit. In this complete process, the ten coulombs:
a. receive heat energy from the resistor.
b. do positive work on the battery.
c. have a net loss of potential energy.
d. have no net change in potential energy.
D
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The British system is a(n) ______________ , or base-12 system
Fill in the blank(s) with correct word
General Questions: A truck is using a hook to tow a car whose mass is one quarter that of the truck. If the force exerted by the truck on the car is 6000 N, then the force exerted by the car on the truck is
A. 1500 N. B. 24,000 N. C. 6000 N. D. 12,000 N. E. We need to know if the car is accelerating to answer this question.
A hydrogen atom is excited to the n = 11 level. Its decay to the n = 7 level is detected in a photographic plate. What is the wavelength of the light photographed? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 7,510 nm B) 4,670 nm C) 12,400 nm D) 4,380 nm
When a spinning ice skater pulls in his arms, he spins faster because ________
A) there exists an unbalanced reaction force B) there is less friction with the ice C) there is less friction with the air D) his angular momentum must be conserved, so reducing his radius must increase his speed of rotation