What is the relativistic momentum of a proton traveling at 0.97c?
a. 2.00E–18 kg·m/s
b. 2.81E–18 kg·m/s
c. 2.06E–18 kg·m/s
d. 2.89E–18 kg·m/s
a
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Distinguish between ac and dc. When you plug a light bulb into a wall outlet, where is the source of electrons?
What will be an ideal response?
If the work function of a metal surface is 2.20 eV, what frequency of incident light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 2.50 × 1014 Hz B) 3.53 × 1014 Hz C) 5.92 × 1014 Hz D) 2.05 × 1014 Hz E) 1.02 × 1014 Hz
Harmonic frequencies are:
a. mathematically unrelated to the fundamental frequency. b. all the same. c. 2, 4, 8, 16, ..., etc. times the lowest frequency. d. whole-number multiples of the fundamental frequency. e. squares of the fundamental frequency.
A mixture consists of 70 g of ice and 60 g of liquid water, both at 0°C. (The latent heat of fusion of water is 80 cal/g and the specific heat capacity of water is 1.0 cal/g C°.) The amount of heat that must be added to melt all of the ice is about
A. 4000 cal. B. 5600 cal. C. 32,400 cal. D. 21,600 cal.