Physics, 15.10.2020 01:01 jaycobgarciavis
A Carnot engine absorbs heat at a temperature of 127 °C and exhaust heat at a temperature of 77 °C. Its efficiency is
A. 13%
B. 39 %
C.61%
D. 88 %
E. 90 %
Answers: 1
Another question on Physics
Physics, 22.06.2019 01:30
Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.
Answers: 1
Physics, 22.06.2019 04:00
Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?
Answers: 1
Physics, 22.06.2019 04:30
The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.
Answers: 1
Physics, 22.06.2019 09:00
Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.
Answers: 3
You know the right answer?
A Carnot engine absorbs heat at a temperature of 127 °C and exhaust heat at a temperature of 77 °C....
Questions
Social Studies, 19.10.2021 06:30
Mathematics, 19.10.2021 06:30
Mathematics, 19.10.2021 06:30
Social Studies, 19.10.2021 06:30
Biology, 19.10.2021 06:30
Biology, 19.10.2021 06:30
Mathematics, 19.10.2021 06:30
