Which energy conversion occurs in a battery-powered flashlight?
chemical energy to mecha...
Answers: 2
Physics, 22.06.2019 02:00
Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.
Answers: 2
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
Physics, 22.06.2019 04:50
Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0β with respect to the polarizer, what is the intensity of the light that reaches the photocell?
Answers: 1
Physics, 22.06.2019 12:00
If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?
Answers: 1
Mathematics, 25.09.2020 01:01
French, 25.09.2020 01:01
Mathematics, 25.09.2020 01:01
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Computers and Technology, 25.09.2020 01:01