Momentum: As an electron slows down from 0.9980c to 0.5000c, how much momentum does it lose? (c = 3.0 × 108 m/s, melectron = 9.11 × 10-31 kg)
What will be an ideal response?
4.2 × 10-21 kg ? m.s
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What is the significance of stromatolites?
A) They appear to be fossils of structures made by microbes long ago. B) They indicate that microbes in the distant past were much larger than bacteria of today. C) They show that the oxygen content of Earth's atmosphere was much smaller in the past. D) They are the earliest known fossils of animals.
The amplitude of a lightly damped harmonic oscillator decreases from 60.0 cm to 40.0 cm in 10.0 s. What will be the amplitude of the harmonic oscillator after another 10.0 s passes?
A) 0.00 cm B) 30.0 cm C) 26.7 cm D) 20.0 cm E) 167 cm
Emission nebula take up about how much of the Milky Way galaxy?
A) 1% B) 5% C) 10% D) 99% E) 100%
The Milky Way is considered to be an intermediately wound, barred spiral, which would be type ________, according to Hubble
A) SBb B) B2S C) Sa D) E4 E) SBV