The person who came up with this conjecture was Albert Einstein
In each case, (the pie in a low setting at one hour versus the pie in a high setting at thirty minutes) the amount of energy is the same. However, the amount of power is different. Since power is the amount of work put in certain amount of time, the power in the high setting is larger compared to the power in the low setting.
Answer:
462000J
Explanation:
Quantity of heat= mass x specific heat capacity of iron x change in temp
specific heat capacity of iron is 462J/Kg/K
change in temp = 250-50= 200°C
200°C is equivalent to 200K since 1°C is 1K
Q= mct
= 5x462x200
= 462000J
Newton's 2nd law of motion:
Force = (mass) · (acceleration)
= (70 kg) · (4.2 m/s²)
= (70 · 4.2) kg·m/s²
= 294 newtons
