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lozanna [386]
3 years ago
11

Why are you able to observe the Doppler effect on earth with sound waves but not with light waves?

Physics
1 answer:
VladimirAG [237]3 years ago
6 0

Answer: When an ambulance passes with its siren blaring, you hear the pitch of the siren change: as it approaches, the siren’s pitch sounds higher than when it is moving away from you. This change is a common physical demonstration of the Doppler effect.

Explanation:

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It takes a minimum distance of 57.46 m to stop a car moving at 13.0 m/s by applying the brakes (without locking the wheels). Ass
vivado [14]

Answer:

The minimum stopping distance when the car is moving at

29.0 m/sec = 285.94 m

Explanation:

We know by equation of motion that,

v^{2}=u^{2}+2\cdot a \cdot s

Where, v= final velocity m/sec

u=initial velocity m/sec

a=Acceleration m/Sec^{2}

s= Distance traveled before stop m

Case 1

u=  13 m/sec, v=0, s= 57.46 m, a=?

0^{2} = 13^{2}  + 2 \cdot a \cdot57.46

a = -1.47 m/Sec^{2} (a is negative since final velocity is less then initial velocity)

Case 2

u=29 m/sec, v=0, s= ?, a=-1.47 m/Sec^{2} (since same friction force is applied)

v^{2} = 29^{2}  - 2 \cdot 1.47 \cdot S

s = 285.94 m

Hence the minimum stopping distance when the car is moving at

29.0 m/sec = 285.94 m

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3 years ago
How to convert 250 newton to pounds? It is likely to be difficult to move?
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What sport is better for girls volleyball or softball?
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Either one is fun and great to play!
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Newton's ____ law of motion explains why objects in the back of a truck would keep sliding forward if the truck stopped suddenly
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Answer:

1st

Explanation:

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Which expression is equivalent to g−m ÷ gn?
Vinvika [58]

<u>Answer</u>

(g²n - m)/(gm)


<u>Explanation</u>

g - m ÷ gn = g - m/gn  

Make the equation have the same denominator

  g - m ÷ gn = g - m/gn    = (ggn)/gn  - m/gn

                                          = (g²n)/gn - m/gm

Since they have the same denominator, we can carry out the subtraction on the numerator and then put them under one denominator.

                                      (g²n)/gn - m/gm  = (g²n - m)/(gm)


5 0
3 years ago
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