Physics, 21.08.2019 17:30 bettybales1986
Light with a frequency of 1.21×10^15 hz ejects electrons from the surface of sodium, which has a work function of 2.28 ev . what is the minimum de broglie wavelength of the ejected electrons?
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Physics, 20.06.2019 18:04
Several students in the group made comments to the coach about the back pack. which student has the correct analysis of the forces and motion of the back pack?
Answers: 1
Physics, 21.06.2019 13:00
When describing down syndrome, it's important to note that a. it can be classified as a single-gene disorder b. it is caused when red blood cells cannot properly form hemoglobin c. it causes infected males to have low testosterone levels d. it is usually caused by three copies of chromosome 21 select the best answer from the choices provided. a b
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Physics, 22.06.2019 05:00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.
Answers: 1
Physics, 22.06.2019 12:00
The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
Light with a frequency of 1.21×10^15 hz ejects electrons from the surface of sodium, which has a wor...
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