Answer:
i can't understand your question haha
We need to find mass number
Your answer is 40u
The correct option is this: THE ATOMS IN THE SOLID WILL BE VIBRATING IN POSITION.
This is because the molecules in solids are held together by strong inter molecular forces, the molecules can not move about freely but they cab vibrate in their position.
<span>One way to get more energy out of fuels is to increase _____, the percentage of energy used for work.
</span><span>C.efficiency
Hope this helps :)</span>
