At what rate is thermal energy generated in the 5-? resistor when ? = 24 V?
a.
13 W
b.
3.2 W
c.
23 W
d.
39 W
e.
51 W
b
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The Herschels' grindstone model of the Milky Way star system was too small because
a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds.
Why are Kepler's Laws of Planetary Motion a success story for the scientific method?
Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms of accuracy and significant figures, what value would you record on your data sheet if the balance is accurate to one-tenth of a gram?
A) 12.9 g B) 12.95 g C) 13 g D) 13.0 g
Find the specific heat (in cal/mole K) of a gas kept at constant volume when it takes 1.0 × 10^4 J of heat to raise the temperature of 5.0 moles of the gas 200 K above the initial temperature
a. 7.5 b. 5.0 c. 2.4 d. 10 e. 20