A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules at STP have
A)
the same average molecular speeds.
B)
the same number of molecules.
C)
the same diffusion rates.
D)
all of the above
E)
none of the above
B
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The longer the wavelength, the bluer and brighter the star appears
a. True b. False Indicate whether the statement is true or false
In stage 6 or 7 of the formation of a large cluster of stars, a nebula is formed around the cluster. This happens because:
A) the number of stars is so great and so intense that the gas from the original cloud is ionized. B) the stars are out of their cocoons of dust and their radiation ionizes the gas from the original cloud. C) there are brown dwarfs everywhere in between the stars, so the gas is lit up by their low-intensity light. D) there are thousands of Sun-like stars with planets around them and the formation of planets ionizes the leftover gas. E) there are massive O and B stars emitting high energy photons that ionize the remainder of the cloud.
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The potential energy of the crate is __________
Fill in the blank(s) with correct word
A series RLC circuit has a resistance of 500
and inductance of 20.0 mH, and a capacitance of 2.00
F The power source provides a voltage of v = (170 sin(377t))V. What is the peak current in this circuit?
A. 92.4 mA B. 101 mA C. 121 mA D. 170 mA E. 240 mA