None of the above
When a metal spoon with a temperature of 20 degress Celsius is ploud
into a...
Physics, 14.05.2021 17:00 bossboybaker
None of the above
When a metal spoon with a temperature of 20 degress Celsius is ploud
into a cup of water with a temperature of 90 degrees Celsius the spoon
heat up. This is an example of:*
no
Answers: 1
Physics, 22.06.2019 02:30
Agas contained within a piston-cylinder assembly undergoes three processes in series: process 1ο 2: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 2ο 3: constant pressure expansion to 1 liter. process 3ο 1: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat
Answers: 2
Physics, 22.06.2019 03:00
Which process is represented by the pv diagram? a. the isobaric process b. the isovolumetric process c. the isothermal process d. the adiabatic process
Answers: 1
Physics, 22.06.2019 04:00
19. explain why a magnet from your refrigerator could not be used to lift something as heavy as a car. (chapter 7 β pages 202-203) 20. can a magnet ever have a single pole? explain your answer. (chapter 7 β page 208) 21. what happens to the wavelength of a wave if the frequency is increased? (chapter 9 β pages 280-281) 22. an ocean wave has a wavelength of 10 m and a frequency of 4.0 hz. what is the velocity of the wave? show the appropriate equation from your book and show your work with units. (chapter 9 β page 282) 23. as you sit outside, the sound of a siren becomes lower in pitch. is the emergency vehicle moving away from or towards you? explain how you know. (chapter 10 β page 315-316) 24. why are two astronauts in space unable to hear one another? (chapter 10 β page 307) 25. explain in at least 3 sentences how electromagnetic waves form. (chapter 11 β page 338-339) 26. using the chart on page 345 in your textbook, what are the three types of electromagnetic wave with wavelengths shorter than those of visible light. give an example of each. (chapter 11 β pages 345-351) 27. explain why a leaf usually appears to be green, but a rose typically appears red. (chapter 12 β page 373) 28. what is the difference in light that is refracted compared to light that is reflected? think in terms of speed of light as well as what happens to light waves when they interact with a medium. (chapter 12 β pages 369-370) 29. how are concave and convex lenses different? (chapter 13 β page 408-410) 30. what type of mirror is used in rearview mirrors in cars? why is it important that these mirrors have the warning, βobjects in mirror are closer than they appear.β? (chapter 13 β page 405)
Answers: 3
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