The wavelength of a periodic wave is 0.750 m. If the frequency is 425 Hz, then what is the velocity of the wave?
A. 210 m/s
B. 276 m/s
C. 319 m/s
D. 410 m/s
E. 472 m/s
C. 319 m/s
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Current: A charge of 12 C passes through an electroplating apparatus in 2.0 min. What is the average current in the apparatus?
A. 0.10 A B. 0.60 A C. 1.0 A D. 6.0 A
The total mass of the Kuiper belt is greater than that of the asteroid belt
Indicate whether the statement is true or false
What energy must be added or given off in a reaction where a helium atom is separated into two hydrogen atoms and two neutrons? (Atomic masses for each: hydrogen, 1.007825 u; neutron, 1.008665 u; helium, 4.002602 u; also, 1 u = 931.5 MeV/c2.)
a. 28.3 MeV given off b. 20.7 MeV added c. 20.7 MeV given off d. 28.3 MeV added
In contrast to the plum-pudding model of the atom, Rutherford's model:
a. was first to explain atoms emitting discrete frequencies. b. had the positive charge concentrated in a small region. c. eliminated radiation from accelerating charges. d. had the positive charge spread uniformly through the atom.