Physics, 19.04.2020 01:59 martinez6221
A car is moving towards a student at constant speed. The student notices that the sound the car makes gets louder and louder
as the car approaches. The student suggests that the car sounds louder as it approaches because of the Doppler effect that he
learned about in science class this week.
How would you respond to the above statement made by the student?
The student has stated a valid conclusion for his observation.
The student has drawn a poor conclusion because the car does not get
louder
The student has drawn a poor conclusion because the Doppler effect is
about frequency and not amplitude.
The student has drawn a poor conclusion because the Doppler effect is
about amplitude and not frequency.
Answers: 1
Physics, 21.06.2019 22:00, baidentheodore617
Let v1, v2, w be three linearly independent vectors in r 3 . that is, they do not all lie on the same plane. for each of the following (infinite) set of vectors, carefully sketch it in r 3 , and determine whether or not it is a vector space (i. e., a subspace of r 3 ). explain your reasoning
Answers: 2
Physics, 22.06.2019 11:50, morenodonaldo762
The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e
Answers: 1
Physics, 23.06.2019 01:00, lerasteidl
Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a. sample absorbance at 315nm a 0.45 b 0.80
Answers: 1
Physics, 23.06.2019 01:30, antoniocapetillo80
Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.
Answers: 2
A car is moving towards a student at constant speed. The student notices that the sound the car make...
Social Studies, 05.10.2019 11:00
Computers and Technology, 05.10.2019 11:00
Social Studies, 05.10.2019 11:00
Mathematics, 05.10.2019 11:00
Biology, 05.10.2019 11:00
History, 05.10.2019 11:00
Biology, 05.10.2019 11:00