unit of energy


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George_Zhu
Posts: 29
Joined: Mon Jun 17, 2019 7:23 am

unit of energy

Postby George_Zhu » Thu Jul 04, 2019 1:47 pm

keV is the unit of what?

David Zhang 1B
Posts: 48
Joined: Mon Jun 17, 2019 7:23 am

Re: unit of energy

Postby David Zhang 1B » Thu Jul 04, 2019 3:57 pm

It's a unit of energy. In Joules, it's about 1.602x10-19 J.

Norman Dis4C
Posts: 50
Joined: Sat Sep 28, 2019 12:16 am

Re: unit of energy

Postby Norman Dis4C » Thu Oct 17, 2019 3:46 pm

I got tricked by the unit as well... There is one question on the textbook that requires you to convert Kev to Joule before calculation.

Ayushi2011
Posts: 51
Joined: Wed Feb 27, 2019 12:17 am

Re: unit of energy

Postby Ayushi2011 » Thu Oct 17, 2019 3:49 pm

It is a unit of energy. 1keV = 1.602 * 10^-16 J. Normally an eV = 1.602 *n10^-19 J but since this is Kilo electron volt, the power to 10 is raised to -16.

Matthew ILG 1L
Posts: 54
Joined: Sat Aug 17, 2019 12:15 am

Re: unit of energy

Postby Matthew ILG 1L » Thu Oct 17, 2019 10:44 pm

I know the problem you're referring to. Its 1.B.5. You have to convert the 140.511keV to eV by multiplying it by 10^3, and then multiply the eV by 1.6022x10^-19J to find the J.

105335337
Posts: 52
Joined: Sat Aug 24, 2019 12:15 am

Re: unit of energy

Postby 105335337 » Thu Oct 17, 2019 10:52 pm

keV is an interesting unit. 1 keV is about 1.602x10-19 J.

PGao_1B
Posts: 50
Joined: Sat Jul 20, 2019 12:15 am

Re: unit of energy

Postby PGao_1B » Sun Oct 20, 2019 2:09 pm

keV is the abbreviation for kiloelectron volts, a unit of energy equivalent to the kinetic energy gained by an electron falling through a potential of 1 volt.

Donna Nguyen 3K
Posts: 50
Joined: Sat Aug 24, 2019 12:17 am

Re: unit of energy

Postby Donna Nguyen 3K » Wed Oct 23, 2019 1:42 am

keV is the abbreviation for kiloelectron volts, a unit of energy. This is equal to 1000 eV (electron volts). 1 eV is equal to 1.602*10^-19 J, which is also a constant we have seen before for energy.


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