Question

what is speed of light and what is relation between mass and energy
FOR THIS I WILL MARK AS BRAINLEE ANSWER

Answer 1

hey here is your answer
ans1.The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299,792,458 metres per second. 


ans2.In everyday experience mass is a property of objects composed of particles such as atoms. Mass is the property that gives an object's inertia. Inertia means it takes force to accelerate the object. ... Adding energyto an object does also add mass to the object.

Hope it helps you

Answer 2

The equation E = mc^2 states that the amount of energypossessed by an object is equalto its mass multiplied by the square of the speed of light.