## Determine the first-law thermal efficiency and compare it to that of a Carnot cycle operating between the same temperature extremes.

An engineer proposes to eliminate the condenser in an ideal Rankine cycle to form an open cycle. Lake water is available at 16°C. The lake water is pumped to 5 MPa and then heated at constant pressure to 400°C. The “spent” steam is rejected back into the lake. Determine the first-law thermal efficiency of this process and compare it with that of Problem 8.8. What are some of the practical problems with this proposed cycle?

Problem 8.8

In a Rankine cycle, steam leaves the boiler at 400°C and 5 MPa. The condenser pressure is 0.01 MPa. The water entering the pump is saturated. Determine the first-law thermal efficiency and compare it to that of a Carnot cycle operating between the same temperature extremes.

### How much uranium-235 would be consumed in a fission bomb with a 20-kt explosive yield?

1. How much uranium-235 would be consumed in a fission bomb with a 20-kt explosive yield? 2. A neutron collides elastically head-on with a stationary deuteron in a reactor moderated….

### Compare your answer with the 3.6×10⁶ tons of coal needed to fuel a comparable coal-burning power plant

A laser-fusion fuel pellet has mass 5.0 mg and consists of equal parts (by mass) of deuterium and tritium. (a) If half the deuterons and an equal number of tritons….

### explore this indirect approach to particle detection by plotting the data in the table below.

1. Your roommate is writing a science-fiction novel set very far in the future, 70 Gy after the Big Bang. One of the characters is a cosmologist, and your roommate….