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vovikov84 [41]
3 years ago
13

When a police officer receives information that you are speeding in your vehicle, she is using the ______________ of the wave to

measure the Doppler Effect.
a. amplitude
b. refraction
c. frequency
d. resonance
Physics
1 answer:
Alex3 years ago
6 0
I think the corect answer would be C. When a police officer receives information that you are speeding in your vehicle, she is using the frequency of the wave to measure the Doppler Effect. As the speed of a vehicle increases, the greater the change of the frequency of the waves would be transmitted to the radar guns which is being used by the police officer. Doppler effect is an effect that is observed in sound and light waves as these waves move away or to the direction of the observer. This is being used in many applications like in astronomy, weather balloons, the radar guns,and for underwater researches.
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An apple weighs at 1N. the net force on the apple when it is in free fall is?
ololo11 [35]
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("Free fall" means that the only force acting on it is the force of gravity.
The force of gravity on an object is the force we call its "weight".)
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4 years ago
1. Quais motivos fazem com que o Croquet Golf seja a variação da
KiRa [710]
  • Probablemente porque es un deporte tranquilo y relajante si de eso estás hablando

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3 0
3 years ago
A bicyclist of mass 60kg supplies 340W of power while riding into a 5 m/s head wind. The frontal area of the cyclist and bicycle
NikAS [45]

Answer:

87.1 mph

Explanation:

We are given that

Mass,m=60 kg

Power,P=340 W

Speed,v=5 m/s

Area,A=0.344 m^2

Drag coefficient,C_d=0.88

Coefficient of rolling resistance,\mu_r=0.007

Friction force,f=\mu_rmg=0.007\times 60\times 9.8=4.1 N

Where g=9.8 m/s^2

Let speed of cyclist=v'

Drag force,F_d=\frac{1}{2}\rho_{air}AC_dv^2

Density of air,\rho_{air}=1.225 kg/m^3

F_d=\frac{1}{2}\times 1.225\times 0.344\times 0.88(5)^2=4.635N

Power,P=(F_d+f)\times v'

340=(4.1+4.635) v'=8.735v'

v'=\frac{340}{8.735}=38.9m/s

v'=87.1 mph

1 m=0.00062137 miles

1 hour=3600 s

7 0
3 years ago
When a 2.50 kg object is hung vertically on a certain light spring described by hookes law the spring stretches 2.76 cm.
Readme [11.4K]
F=K*X,
F=M*a 

M*a=K*X

2.5*9.81=K*0.0276

24.525=K*0.0276

24.525/0.0276=K

K= 888.6 N/m ---- force constant 

assuming 2.5 refers to the new extension, just divide F/ 0.025
to get

981N/m 


8 0
4 years ago
As the distance between two objects increases, the gravitational force of attraction between them will
jeka94
That force DEcreases. This is a big part of the reason why the Earth attracts you with more force than Jupiter does.
4 0
3 years ago
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