Calculating Velocity


Moderators: Chem_Mod, Chem_Admin

904901860
Posts: 24
Joined: Mon Jan 08, 2018 8:16 am

Calculating Velocity

Postby 904901860 » Sun Dec 09, 2018 2:24 pm

This is the equation you would use for this correct? because p= mv?

Ana Pedreros
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

Re: Calculating Velocity

Postby Ana Pedreros » Sun Dec 09, 2018 3:27 pm

yes and you could also use ke=1/2mv^2

davidryan3f
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Re: Calculating Velocity

Postby davidryan3f » Sun Dec 09, 2018 3:56 pm

yes, the two equations involving velocity are p=mv and KE= 1/2mv^2

Alli Hinmon 3E
Posts: 30
Joined: Wed Nov 08, 2017 3:00 am

Re: Calculating Velocity

Postby Alli Hinmon 3E » Sun Dec 09, 2018 5:37 pm

Make sure you know the Difference!!!
p=mv is for the velocity of a photon, he will usually give you the momentum.

Ke is for Electrons!

Lynsea_Southwick_2K
Posts: 55
Joined: Fri Sep 28, 2018 12:25 am

Re: Calculating Velocity

Postby Lynsea_Southwick_2K » Sun Dec 09, 2018 5:53 pm

What is the units for momentum, p?

805169754
Posts: 61
Joined: Fri Sep 28, 2018 12:19 am

Re: Calculating Velocity

Postby 805169754 » Sun Dec 09, 2018 5:54 pm

Lynsea_Southwick_3F wrote:What is the units for momentum, p?
If the mass is in kilograms and the velocity is in meters per second then the momentum is in kilogram meters per second (kg⋅m/s)

205458163
Posts: 33
Joined: Wed Jun 26, 2019 12:15 am

Re: Calculating Velocity

Postby 205458163 » Tue Jul 02, 2019 11:27 am

Most of the time we use 1/2mv^2 to calculate velocity.

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

Re: Calculating Velocity

Postby George_Zhu » Tue Jul 02, 2019 12:52 pm

It depends on different condition, like if you need to calculate the velocity, and you have time and distance, you can use the most common equation:v=s/t, and if you have the momentum and mass of a subject, and you need to calculate the velocity, you can use the equation you have mentioned.

Brian Kwak 1D
Posts: 88
Joined: Fri Sep 28, 2018 12:17 am

Re: Calculating Velocity

Postby Brian Kwak 1D » Wed Jul 03, 2019 11:07 am

Depends on the know information you have. If you know the kinetic energy of an electron then you could use 1/2mv^2 or if you know the momentum of the electron then you could use p=mv. Also the units for momentum would be kg.m.s^-1.

Yen Ho Chou 1D
Posts: 28
Joined: Wed Feb 27, 2019 12:16 am

Re: Calculating Velocity

Postby Yen Ho Chou 1D » Sun Jul 07, 2019 10:54 pm

electrons use ke, photons use the momentum equation


Return to “DeBroglie Equation”

Who is online

Users browsing this forum: No registered users and 6 guests