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nalin [4]
3 years ago
8

HELP ASAP PLS

Physics
2 answers:
Marysya12 [62]3 years ago
8 0
Speed can be measured by bouncing waves off an object, because of the Doppler Effect.
german3 years ago
3 0

Answer: B. Doppler Effect

Explanation: Also known as Doppler shift, from Johann Christian Andreas Doppler, the scientist who first proposed this effect, the Doppler effect is the apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves. As such, the

Doppler radar such as those employed by the police uses reflected microwaves to determine the speed of moving objects which it does this by emitting waves of a particular frequency, and then analysing the reflected wave for frequency changes.

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When your vehicle is properly parked in a straight-in parking space,
marin [14]

The correct answer to this question would be:

<span><span>A. </span>No part of your vehicle will extend out into the traffic lane.</span>  

This kind of maneuver only shows your skill to handle the vehicle in tight spaces, ability to judge distance, and showing control of the vehicle as you turn into a straight-in parking space.  

<span> </span>

3 0
3 years ago
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The tip of the fan blade is 0.61 m from the center of the fan. The fan turns at a constant speed and completes 2 rotation every
Goryan [66]

Answer:

What is the centripetal acceleration of the tip of the fan blade?

6.0 m/s2

48 m/s2

53 m/s2

96 m/s2

Answer is 96

Explanation:

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4 years ago
Regardless of the method used to generate electrical energy, the amount of energy provided by the
PSYCHO15rus [73]
Some of the energy is converted into heat. This is the main reason why electrical material gets hot when connected to a source. Therefore, your initial energy does not equal final energy. This does not violated energy conservation law because the energy is being converted so it is never lost. 
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4 years ago
Any 3 differences between telescope and microscope
Keith_Richards [23]
An instrument used to observe or imagine very small object using an optical mangifier
mirco cell.
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4 years ago
Ted lifts a 10N weight at a height of 1.5 m in 1 second. Johnny lifts a 10N weight at a height of 1.5 m in 2 second. Which state
fenix001 [56]

Answer:

he affirmations the correct ones are: A and D

Explanation:

To find out which expressions are correct, let's calculate the work and power done by each person

the expression for work is W = F and

the expression for power is P = W / t

In this case the work is positive because the beast is in the same direction of displacement.

Ted

        W₁ = 10 1.5

        W₁ = 15 J

        P₁ = 15/1

        P₁ = 15 w

Johnny

the job

         W₂ = 10 1.5

         W₂ = 15 J

the potential

          P₂ = 15/2

          P₂ = 7.5 w

therefore we see that the work of both is the same, but Ted developed twice as much power as Johnny

when resisting the affirmations the correct ones are: A and D

3 0
3 years ago
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