a) Electrons are ejected from a photoelectric surface with a
maximum speed of 4.20 x 105 m/s. If the work function of
the metal is 2.55 eV, what is the wavelength of the incident light
? Express your answer in the format of a.bc x 10-d m
b) A photoelectric cell is illuminated with white light
(wavelengths from 400 nm to 700 nm). What is the maximum kinetic
energy (in eV) of the electrons emitted by this surface if its...
The trajectory of a rock ejected from the Kilauea volcano, with
a velocity of magnitude 46.9 m/s and at angle 35.1 degrees above
the horizontal. The rock strikes the side of the volcano at an
altitude of 39.1m lower than its starting point. Calculate the
magnitude of the rock’s velocity at impact? Use g = 9.8
m/s2.
Photoelectrons are ejected from a metal when exposed to 238-nm
radiation, but no photoelectrons are observed when the metal is
exposed to 265 nm radiation. Which of the following is true?
a. No photoelectrons will be ejected if the metal is exposed to
285 nm radiation.
b. 226 nm radiation will cause a greater number of
photoelectrons to be ejected from the metal.
c. No photoelectrons will be ejected if the metal is exposed to
253 nm radiation.
d. 253...
What is the energy per mole of photons of light with a
wavelength of 812.4 nm? a.) 2.45 x 10^-19 KJ/mol b.) 1.47 x 10^2
KJ/mol c.)4.89 x 10^14 KJ/mol d.) 2.22 x 10^35 KJ/mol e.) 3.69
x10^14 KJ/mol (please show work)
What is the maximum velocity of an electron emitted from the
surface of a metal whose work function is 5 eV, if the metal is
illuminated by light of wavelength is 200 nm?
Determine the number of photons with wavelengths between 705 and
713 nm escaping each second from a small opening in a cavity at a
temperature of 9000 K. The opening behaves like a blackbody, and
has a radius of 2.20 ✕ 10−2 mm.
---------------- photons/s
In an atom, what is the maximum number of electrons that can
have the following quantum numbers? n=3, I=2, mI=-2 and n=4, I=1,
mI=+1 Please explain and thank you so much!
What is the maximum number of electrons in an atom that can have
the following quantum numbers? (a) n = 3, ms = -1/2 (b) n = 6, l =
2 (c) n = 7, l = 3, ml = -1 (d) n = 2, l = 1, ml = +1, ms =
+1/2
What is the maximum number of electrons in an atom that can have
the following quantum numbers?
A.) n=2; ms= -1/2
B.) n=5: l=3
C.) n=4; l=3; ml= -3
D.) n=4; l=1; ml=1
Completely confused! Please explain your answer. Thanks...