Physics, 17.07.2019 21:10 rocksac6744
Aheat engine is to operate by rejecting wasted energy as heat to a river that has a mean temperature of 12° c. what must the minimum temperature of its energy source be if it is to produce work with an efficiency of 0.75 (i. e., 75%)?
Answers: 2
Physics, 21.06.2019 14:20
Physics make-up packetname_cle14. an observer hears a sound with a frequency of 400 hz. if the speed of sound is 340 m/s,what is the wavelength of the sound? a. 0.85 mb. 1.2 mc. 2.75 m13.6 m15. as sound travels from steel into air, its speed decreases. if the frequency of the wavedoesn't change, what happens to its wavelength? a. it increases(b) it decreasesc. it remains the samed. there is not enough information given
Answers: 1
Physics, 22.06.2019 14:40
Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion
Answers: 2
Aheat engine is to operate by rejecting wasted energy as heat to a river that has a mean temperature...
Physics, 11.05.2021 21:30
Mathematics, 11.05.2021 21:30
Social Studies, 11.05.2021 21:30
Spanish, 11.05.2021 21:30
Mathematics, 11.05.2021 21:30
Mathematics, 11.05.2021 21:30
Mathematics, 11.05.2021 21:30