In a photoelectric effect experiment, electrons emerge from a copper surface with a maximum kinetic energy of 1.10 eV when light shines on the surface. The work function of copper is 4.65 eV
Which one of the following values is closest to the wavelength of the light? (h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J)
A) 360 nm B) 150 nm C) 1100 nm D) 220 nm
D
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The diagram below shows a light curve from a supernova. How many days after maximum light did it take for the supernova to decrease in brightness by a factor of 100?
a.
less than 50
b.
50
c.
150
d.
250
e.
more than 250
When a volume of air is compressed, air temperature
A) increases. B) decreases. C) neither of these
A heater is rated to dissipate 2880 W when connected to a 120 V source. The current drawn by the device is
A. 0.133 A. B. 240 A. C. 60 A. D. 24 A. E. 30 A.
The product of one ______________ and one meter is one joule
Fill in the blank(s) with correct word