Say m is in grams, c is in metres per second, what unit will e be in.
2007-10-03 16:37:42 · 14 answers · asked by Allen 1 in Science & Mathematics ➔ Astronomy & Space
E = the energy equivalent to the mass (in joules),
m = mass (in kilograms), and
c = the speed of light in a vacuum (celeritas) (in metres per second)
VR
2007-10-03 16:44:13 · answer #1 · answered by sarayu 7 · 0⤊ 0⤋
E is joules (j)
m is kilograms (kg)
c is 3 x 10^8 metres per second
These are all standard SI units.
2007-10-03 20:09:14 · answer #2 · answered by futuretopgun101 5 · 0⤊ 0⤋
This mixture of systems of units invites disaster. So many students have enormous difficulty with handling units in any case, so mixing SI (which metre/sec belongs to), with CGS (where the gram is placed) will produce the wrong answer from all but the finest students.
To answer 2 slightly different questions:
mass in kg, vel in m/s ---> energy in joules
mass in g, vel in cm/s ---> energy in ergs
Don't even think about mixing units in your calculations.
So if you are supplied with quantities in SI and CGS, convert all to SI and get the answer in joules.
Remember the old advice: KEEP IT SIMPLE!
*Convert all data to SI
*calculate
*result in SI
SIMPLE
2007-10-03 19:43:12 · answer #3 · answered by Red Campion 2 · 0⤊ 0⤋
Energy is measured in Joules which have the standard S.I.
units of Newtons * distance
a newton is kg m/s^2
and distance is in meters
so one Joule =kg*m^2/s^2
1kg=1000grams
s is time in seconds
if m is in grams divide by 1000
so, the units with grams instead of kilograms would be
E=
(grams*(meters)^2/(s)^2)/1000
2007-10-03 16:52:08 · answer #4 · answered by Anonymous · 0⤊ 0⤋
* E = the energy equivalent to the mass (in joules),
* m = mass (in kilograms), and
* c = the speed of light in a vacuum (celeritas) (in metres per second).
In your equation E will be in gram-(meters/second)^2
2007-10-03 16:45:30 · answer #5 · answered by jeff d 1 · 0⤊ 0⤋
In the SI system, m is in kilograms, c is in metres per second and E is in joules. If you use the mass in grams you'll get the energy in millijoules.
2007-10-03 16:41:36 · answer #6 · answered by Scarlet Manuka 7 · 2⤊ 0⤋
Ergs=grams times 30 billion squared
2007-10-04 00:49:49 · answer #7 · answered by Billy Butthead 7 · 0⤊ 0⤋
simple dimensional analysis. if m is in grams and c in in meters per second, E is in units of g m^2 s^-2, that is millijoules - joules are the unit of energy you get with *kilograms* (the standard SI unit for mass), meters and seconds.
2007-10-03 16:51:12 · answer #8 · answered by vorenhutz 7 · 0⤊ 0⤋
E is energy and therefore the unit is joules,that of m is kilogram or gram and c is m/s^2.The whole formular is a kinetic energy formular.
2007-10-04 03:44:58 · answer #9 · answered by obinna o 1 · 0⤊ 0⤋
Energy is Joules
Mass is Grams
Velocity is m/s
The equation is subjective and can be adapted to your individual system so long as you use the same SI units of measurement.
The base line for velocity in physics for example, is the speed of light in a vaccum.
2007-10-03 18:09:56 · answer #10 · answered by Anonymous · 0⤊ 1⤋