what is your mass in kj convert it to pound science
Answer (1)
Let's assume that the unit is kilograms (kg) and not kilojoules, kJ. I can convert my 225 pounds (lbs, my force on Earth) with the use of a conversion factor:We know, by definition, that 1 lb = 0.4536 kgMake this into a conversion factor by dividing one side by the other:Either1) (1 lb)/(0.4536 kg) = 1, or2) (0.4536 kg)/(1 lb) = 1Both of these expression are equal to 1, so we can divide or multiply them and they won't change the basic truth in the original number. Both the values and units will change, but the original statement is still valid.If we want to covert 225 lbs to kg, I'll choose the second conversion factor, since I like multiplication more than division. Either factor could be used, but the type of operation changes:1) (225 lbs)/[(1 lb)/(0.4536 kg)] = 102.06 kg, or2) (225 lbs)*(0.4536 kg)/(1 lb) = 102.06 kg[Since there are 3 sig figs in the 225 lbs, the final answer should be expressed as 102 kg.===================If kilojoules (energy) was the intended conversion, then we would need to apply E = mc^2 to the calculation. m is the mass and c is the speed of light.Energy (kJ) = (102 kg)*(3 x 10^8 m/s)^2Energy = 9.17 x 10^15 kJ [Note: 1 kg*m/s^2 is 1 kJ]This is the energy equivalent to about 145,000 Hiroshima nuclear bombs. But I promise I'd not leave such a hazardous mess. There would be no visible signs of blood, bone, body, and very little radioactive debris. Still, don't try at home. The energy will vaporize the neighborhood, and its neighbors, computers, cellphones, toys, and comic books.
