## unit of energy

$E=hv$

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

### unit of energy

keV is the unit of what?

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

### Re: unit of energy

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

Norman Dis4C
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

### Re: unit of energy

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: 101
Joined: Wed Feb 27, 2019 12:17 am

### Re: unit of energy

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: 112
Joined: Sat Aug 17, 2019 12:15 am

### Re: unit of energy

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: 103
Joined: Sat Aug 24, 2019 12:15 am

### Re: unit of energy

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

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 2L
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: unit of energy

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.