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

Physics & Space Science

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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

Physics & Space Science

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.

Physics & Space Science

What causes auroras and where are they most prominent on Earth?

What will be an ideal response?

Physics & Space Science

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

Physics & Space Science