Which of the following is an acceptable description of the frequency of a transverse wave?
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Answer:
a) t=1s
y = 10.1m
v=5.2m/s
b) t=1.5s
y =11.475 m
v=0.3m/s
c) t=2s
y =10.4 m
v=-4.6m/s (The minus sign (-) indicates that the ball is already going down)
Explanation:
Conceptual analysis
We apply the free fall formula for position (y) and speed (v) at any time (t).
As gravity opposes movement the sign in the equations is negative.:
y = vi*t - ½ g*t2 Equation 1
v=vit-g*t Equation 2
y: The vertical distance the ball moves at time t
vi: Initial speed
g= acceleration due to gravity
v= Speed the ball moves at time t
Known information
We know the following data:
Vi=15 m / s
t=1s ,1.5s,2s
Development of problem
We replace t in the equations (1) and (2)
a) t=1s
=15-4.9=10.1m
v=15-9.8*1 =15-9.8 =5.2m/s
b) t=1.5s
=22.5-11.025=11.475 m
v=15-9.8*1.5 =15-14.7=0.3m/s
c) t=2s
= 30-19.6=10.4 m
v=15-9.8*2 =15-19.6=-4.6m/s (The minus sign (-) indicates that the ball is already going down)
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That all depends on what the question is.
If the question is "How long does it take you to get there ?",
then the answer is 'No' .
If the question is "What color is the car ?", then
the answer is 'Yes' .
b. a line along which air pressure is constant
c. a region in which the weather is not changing
d. a symbol on a weather map showing wind direction
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Answer:
B.a line along which air pressure is constant
Explanation:
i took the quiz and got it right
B. transverse
C. longitudinal
D. mechanical
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(2)higher speed
(3)longer period
(4)higher frequency
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Answer: The correct answer is higher frequency.
Explanation:
Doppler's effect is defined as the apparent change in the frequency of an electromagnetic wave due to the relative motion of an observer and source.
In the given problem, a stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer. In this case, there will be higher frequency.
If a stationary police officer directs radio waves emitted by a radar gun at a vehicle moving away the officer. In this case, there will be smaller frequency but will have a longer wavelength.
Therefore, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.
The emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher wavelength.
What is the Doppler effect?
A sudden change in the frequency due to the distance between the objects and source is explained by the doppler effect.
As the source and observer travel toward each other, the frequency of sound, light, or other waves increases or decreases.
The emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher wavelength.
Hence option 4 is correct.
To learn more about the doppler effect refer to the link;
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Answer:
show how you would connect three resistors each of resistance 6 ohm so that the combination has a resistance of first 9 ohm second 4 ohm
Explanation:
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