3. The temperature of a block of iron, which has a specific heat of 450 J/kg C increases by 12 C when 3500 J of energy are added to it. What is the mass of the block of iron?
Formula
substitution
answer
unit

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?