Question

I want the answer of first and last question not middle question answer ​

Answer 1

First question:

b. Ideal machine

last question:

a. 9 × 10^10 J

Step-by-step explanation:

`{ \bf{E = m {c}^(2) }} \\ { \sf{E = (1 * {10}^( - 6) ) * {(3 * 10 {}^(8)) }^(2) }} \\ { \sf{E = 9 * {10}^(10) \: joules }}`

Answer 2

the first one is ideal

I'm not sure about the last one sorry