Special relativity (mass-energy) Calculator

Calculates the mass-energy of a body moving with some relative velocity with respect to the observer.

Rest mass m0
    1. kg
Relative velocity v
    1. km/s
    2. ≦c

Rest mass energy E0
    1.  
    2. MJ
Relativistic mass energy E
    1.  
    2. MJ
Mass energy rate E/E0
    1.  
Velocity ratio to light v/c
    1.  
    2. %
    Special relativity (mass-energy)
    [1-10] /14Disp-Num
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    [1]  2019/12/10 01:52   Male / 30 years old level / An office worker / A public employee / Useful /
    Purpose of use
    Determining the speed of the 1991 "Oh My God" particle event based on an assumption of it being a slightly less fast iron nucleus, and then applying that speed to a 4mg micrometeor (diameter of ~ 0.5mm) and calculating if the energy would be less or more than the energy of the Chicxulub impact event. 2,200,729,956,560,423,000 MJ seems to be roughly equivalent to 4 dinosaur-killing asteroid impacts at the same time.
    [2]  2019/06/11 19:54   Male / 20 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    understanding why exceeding the speed of light would violate half of the known physics
    [3]  2019/05/02 19:28   Male / 30 years old level / An office worker / A public employee / Very /
    Purpose of use
    What would be the surface gravity of a DVD of the film 'Gravity' starting Sandra Bullock if it was accelerated to 99.99999999999702% the speed of light? The answer is a rather poultry 0.0000043g. This low number probably reflects the poor quality of the film.
    [4]  2019/01/24 06:26   Female / 40 years old level / Others / Very /
    Purpose of use
    To calculate the energy of an 866.67 fm³ mass of neutron degenerate matter at neutron star core density travelling at 99.9999% c.
    [5]  2018/08/06 11:52   Male / Under 20 years old / High-school/ University/ Grad student / Very /
    Purpose of use
    Determining yield of a liquid mercury-based RKV
    Comment/Request
    This is incredible.
    [6]  2018/02/05 08:51   Male / 20 years old level / An office worker / A public employee / Very /
    Purpose of use
    Sci-fi writing.
    Comment/Request
    Holy, this calculator is amazing. Thanks.
    [7]  2018/01/31 17:34   Male / 60 years old level or over / A retired people / Very /
    Purpose of use
    Had a silly little idea I rattling around in my head for years. Thought I could prove it wrong and put it to bed. Turns out it''s valid to more than 16 decimal points. Now I have to kind a competent physicist and ask him how WTF??? Thanks so much, if I had found this site earlier I would be finished now. ;-)
    [8]  2018/01/31 06:37   Male / Under 20 years old / High-school/ University/ Grad student / Very /
    Purpose of use
    Super useful for determining the power of a 2 cm diameter tungsten ball used in a Relative Kinetic Kill Vehicle.
    [9]  2017/11/04 16:57   Male / 20 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    Research into the destructive potential/ Hard Science fiction
    [10]  2017/07/25 10:18   Male / 60 years old level or over / Self-employed people / Very /
    Purpose of use
    Generator

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