Physics, 14.06.2021 01:00 princeton23124
Over a period of 15s, a train traveling at 20m/s slows to 7.0m/s for a highway crossing. What was the average acceleration of the train during that 15s time interval?
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
Physics, 22.06.2019 19:30
How many electrons in an atom could have these sets of quantum numbers? =3n=3 electronselectrons =4,β=2n=4,β=2 electronselectrons =6,β=β=β1n=6,β=2,mβ=β1
Answers: 3
Physics, 22.06.2019 20:00
Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?
Answers: 3
Physics, 22.06.2019 22:00
A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?
Answers: 2
Over a period of 15s, a train traveling at 20m/s slows to 7.0m/s for a highway crossing. What was th...
Mathematics, 08.03.2021 23:10
Computers and Technology, 08.03.2021 23:10
Physics, 08.03.2021 23:10
Mathematics, 08.03.2021 23:10
History, 08.03.2021 23:10
Mathematics, 08.03.2021 23:10