Answer:
B. How efficient can an engine be, in theory?
Explanation:
Answer:
The United States is spread across six time zones. From west to east, they are Hawaii, Alaska, Pacific, Mountain, Central, and Eastern. Imagine that you live in Philadelphia, Pennsylvania at 75 degrees west longitude.
Explanation:
It_Helps...
<u>Answer:</u>
Energy generated by nuclear fusion. When a star is formed, the dominant force is gravity. As nuclear fusion begins the radiation outwards, the inward pull of gravity is resisted by the pressure causing the star to be in equilibrium where energy generated by nuclear fusion at the star's core radiates outward and balancing the force of gravity which is pulling the star inwards. This whole is called the ''gravitational equilibrium''.
The answer to this question is true.