The ________ was a particle predicted to exist long before it was observed because energy is not conserved in beta decays without it.
What will be an ideal response?
antineutrino
neutrino
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What feature(s) of this spectrum indicate(s) that Mars appears red in color?
A) the wavelength of the peak labeled 3 B) the wavelength of the peak labeled 6 C) the fact that the intensity of region 4 is higher than that of region 2 D) the fact that the peak labeled 3 is higher than the peak labeled 6
A fundamental physical reason for the bicycle's high efficiency as a transportation device is
A) it is a wheeled vehicle. B) it is not a heat engine. C) Both of the above. D) it is a heat engine, but one that does not burn fossil fuels. E) Nonsense, trains and airplanes are actually more efficient than bicycles.
What causes auroras and where are they most prominent on Earth?
What will be an ideal response?
Current: A total of 2.0 × 1013 electrons pass a given point in a wire in 15 s. What is the current in the wire? (e = 1.60 × 10-19 C)
A. 1.3 mA B. 1.3 A C. 0.21 ?A D. 3.2 ?A