If an electron has a measured wavelength of 1.20 × 10^-10 m, what is its kinetic energy? (h = 6.63 × 10^-34 J×s, 1 eV = 1.6 × 10^-19 J, and me = 9.11 × 10^-31 kg)
a. 209 eV
c. 105 eV
b. 55.0 eV
d. 147 eV
C
You might also like to view...
Chromatic aberration is absent in
A) converging lenses B) diverging lenses. C) front surface plane mirrors.
A porch roof sloping at 45° accumulated snow to a depth of 30. cm. The roof measured 3.0 m × 5.0 m. If the density of snow was 15. kg/ m2, what was the weight of the snow, in pounds, on the roof?
A) 210 lb B) 74 lb C) 56 lb D) 148 lb E) 105 lb
If the velocity of an aircraft is doubled, the kinetic energy of the aircraft is also doubled
a. True b. False Indicate whether the statement is true or false
At room temperature (20.°C) the area of a hole in a sheet of material is 5.505 cm2. When heated to 830.°C the area increases by 29.0 mm2
(a) What is the thermal coefficient of linear expansion for the material? (b) If the temperature had decreased to -76.° Fahrenheit, what would be the area of the hole?