Please help me ill give brainliest if right

3000kg

Explanation:

Given parameters:

Speed = 20m/s

Kinetic energy  = 600000J

Unknown:

Mass  = ?

Solution:

Kinetic energy is the energy due to the motion of a body.

It is expressed as;

  K.E  = m v²  

m is the mass

v is the speed

  Now find m;

        600000 =    x m x 20²

        600000 = 200m

         m  = 3000kg

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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c. is the answer

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