Physics, 16.11.2019 01:31 bellagracebulle8018
Apolice car is driving down the street with it's siren on. you are standing still on the sidewalk beside the street. if the frequency of the siren is 1500 hz and the car is moving towards you at 15 m/s, what is the frequency you would hear from the siren? (v of sound in air = 343 m/s) (1 point)
1568.60 hz
1321.43 hz
2019.11 hz
1676.92 hz
if the same police car in question 1 has passed you and is now moving away from you at the same speed, what is the frequency you will hear from the siren? (1 point)
1198.67 hz
1390.41 hz
1437.15 hz
1781.55 hz
Answers: 1
Physics, 22.06.2019 16:20
Which best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus
Answers: 1
Physics, 22.06.2019 21:50
Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.
Answers: 3
Physics, 23.06.2019 00:20
You are the coordinator for a program that is going to take place at night in a rectangular amphitheater in the mountains. you will have no access to any electricity, but you must be able to illuminate the entire grounds. you know the intensity of the light from a lantern varies inversely as the square of the distance from the lantern. suppose the intensity is 90 when the distance is 5 m. a. write an equation to model the situation. b. solve for the constant of variation. c. write the equation to model the situation using the constant () of variation. d. you have been given lanterns with 40 light intensity. use your equation to solve for the distance from the lantern. e. you need to illuminate 225 km. how many meters do you need to light? f. how many lanterns will you need?
Answers: 3
Apolice car is driving down the street with it's siren on. you are standing still on the sidewalk be...
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