efficiency= (output/input) *100
efficiency = (695000/722000) *100
efficiency = 96.20 % should be the ans.
A certain process yields 695000 J of mechanical work for every 722000 J of heat flow...
Question 3 of 6 > A certain process yields 6.00 x 10 J of mechanical work for every 1.52 x 10 J of heat flow into the process. What is the thermal efficiency of this process? Ten -
A certain process yields 1.71 x 10% J of mechanical work for every 6.77 x 10 J of heat flow into the process. What is the thermal efficiency Nth of this process? Mth =
The heat pump illustrated beside uses 1.5 kW mechanical power
(that's is 1500 J/s) and extracts 1.2 million calories per hour
from the outside air.
• A) How much heat is pumped into the house every day?
• B) If this heat pump is made such that it is ideal and
reversible, and you decide to heat your house with a gas furnace
and use the heat pump as an heat engine to produce mechanical work,
then what would be...
In a certain chemical process, a lab technician supplies 251 J of heat to a system. At the same time, 64.0 J of work are done on the system by its surroundings. What is the increase in the internal energy of the system?
In one cycle, a certain heat engine takes in 1000 J1000 J of
heat from its high‑temperature reservoir and exhausts 700 J700 J of
heat to its low‑temperature reservoir.
What is the efficiency of the heat engine under these
conditions? 70%,30%,43%,143%,300%.
In one cycle, a certain heat engine takes in 1000 J of heat from its high-temperature reservoir and exhausts 700 J of heat to its low-temperature reservoir. Hot reservoir What is the efficiency of the heat engine under these...
In a certain process, a sample of gas does 950 J of work and releases 500 J of heat into the environment. What is the resulting change of the internal energy ∆E of the gas sample in this process? (A) −1450 J (B) +1450 J (C) +450 J (D) −450 J (E) −500 J
During a certain thermodynamic process, 418 J of work are done on a system and 214 cal of heat are transferred to the system. The change in internal energy during the process is
A lawnmower engine with an efficiency of 0.26 rejects 4700 J of heat every second. What is the magnitude of the work that the engine does in one second?
6 Example 15-8, An engine has efficiency of 22% and produces 18000 J mechanical work at taking in a temperature heat of 810°. a) How much heat input is required, b) how much heat is discharged as waste and c) at what temperature does it spew heat (consider Carnot engine) (10 points)
Suppose a woman does 463 J of work and dissipates 8,854 J of heat in the process. (a) What is the decrease in her internal energy, assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.) kcal (b) What is her efficiency? %