At the speed of light, how long would it take to reach the nearest star, Alpha Centauri?
a. about a month
b. about a year
c. about 4 years
d. about 1000 years
e. about 1,000,000 years
Ans: c. about 4 years
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An ant crawls in a straight line at a constant speed of 0.24 m/s for a distance of 3.0 m, beginning in the corner of a square classroom. It then turns exactly 90 degrees to the right, and proceeds an additional 4.0 m with a constant speed of 0.44 m/s, reaching the other corner of the same wall from which it began. What was the average speed for the full trip from corner to corner?
A. 0.34 m/s B. 0.30 m/s C. 0.21 m/s D. 0.23 m/s E. 0.32 m/s
The energy of the ground state in the Bohr model of the hydrogen atom is -13.6 eV. In a transition from the n = 2 state to the n = 4 state, a photon of energy
A) 3.40 eV is emitted. B) 3.40 eV is absorbed. C) 2.55 eV is emitted. D) 2.55 eV is absorbed. E) 0.85 eV is absorbed.
A 0.500-H inductor is connected into a 110 V rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?
A. 0.189 A (rms) B. 0.292 A (rms) C. 0.584 A (rms) D. 1.19 A (rms) E. 0.093 A (rms)
A __________ interacts via the strong interaction
Fill in the blank(s) with correct word