When a cool gas is placed between a glowing wire filament source and a diffraction grating, the resultant spectrum from the grating is which one of the following?
a. line emission
b. line absorption
c. continuous
d. monochromatic
b
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A typical avocado has 180 Calories. If all this energy could be used to lift a bucket of water weighing 40 N, through what vertical distance could the bucket be lifted? (1 calorie = 4.184 J and 1 Calorie = 103 calories)
a. 1.72E+6 m b. 3.01E+7 m c. 7.53E+5 m d. 1.88E+4 m
What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work function is 5.0 eV when illuminated by a light whose wavelength is 200 nm?
a. 460 b. 650 c. 420 d. 550 e. 1 480
A photocathode that has a work function of 2.4 eV is illuminated with monochromatic light having photon energy 3.5 eV. What is the wavelength of this light?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 350 nm B) 330 nm C) 300 nm D) 380 nm E) 410 nm
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The measure of a body's resistance to being rotated is its angular momentum
Indicate whether the statement is true or false