Different units can be used to measure the same physical quantity, differing only by some multiplicative factor. The cgs unit for magnetic field, the gauss, is equal to ________ tesla
a. 104
b. 10–4
c. 0.5
d. These units do not measure the same physical quantity.
b
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Photoelectric Effect: A photoelectric surface has a work function of 2.10 eV. Calculate the maximum kinetic energy, in eV, of electrons ejected from this surface by electromagnetic radiation of wavelength 356 nm. (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
Which has the greater effect in cooling a substance, 1 g ice at 0°C or 1 g water at 0°C? Explain
Wave interference occurs in
A) transverse waves. B) longitudinal waves. C) both of the above D) none of the above
At 10 cents per kilowatt-hour, how much does it cost to run a 100 watt lightbulb for 200 hours every month?
A) 20 cents per month B) $20 per month C) $2 per month D) impossible to determine because we don't know the voltage E) impossible to determine because we don't know the power