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Natasha_Volkova [10]
3 years ago
7

Help me i have little time left i will give brainliest

Physics
1 answer:
eimsori [14]3 years ago
6 0

Answer:

Explanation:

Conservation of momentum

Initial momentum is zero

3.0(6.0) + 7.0v = 0

v = -18/7 = - 2.57142857...

|v| = 2.6 m/s

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4 years ago
Red light of wavelength 633 nm from a helium-neon laser passes through a slit 0.400mm wide. The diffraction pattern is observed
kogti [31]

Answer:

a)y_{first}=5.3mm

b)y_{second}=10.6-5.3 =5.3 mm  

Explanation:

a)

The width of the central bright in this diffraction pattern is given by:

y=\frac{m\lambda D}{a} when m is a natural number.

here:

  • m is 1 (to find the central bright fringe)                
  • D is the distance from the slit to the screen
  • a is the slit wide
  • λ is the wavelength

So we have:

y_{first}=\frac{633*10^{9}*3.35}{0.0004}

y_{first}=5.3mm

b)

Now, if we do m=2 we can find the distance to the second minima.

y_{2}=\frac{2*633*10^{9}*3.35}{0.0004}

y_{2}=10.6 mm

Now we need to subtract these distance, to get the width of the first bright fringe :

y_{second}=10.6-5.3 =5.3 mm    

I hope it heps you!

     

4 0
3 years ago
If a rocket transfers 2,500,000 MJ of energy when it takes off, how much work is done?
erastovalidia [21]

Answer:

2,500,000 MJ (2.5\cdot 10^6 J)

Explanation:

According to the work-energy theorem:

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In this problem, the energy transferred by the rocket is

E=2,500,000 MJ=2.5\cdot 10^6 J

Therefore, the work done must be equal to the energy transferred, therefore:

W=E=2.5\cdot 10^6 J

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ra1l [238]

Answer:

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Explanation:

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4 0
4 years ago
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