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tamaranim1 [39]
3 years ago
12

Help with ALL PLZZZz

Physics
1 answer:
Vika [28.1K]3 years ago
4 0
I can't read the ones on the top but, 7. Is D which you put lol and I believe what you put for 9. is right and 10. I believe your answer is H aka C lol Hope this helps!!! :D
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Which force would result in a balanced force for the
ohaa [14]

Answer:

F= 45 N

Explanation:

4 0
3 years ago
A diffraction grating with 750 slits per mm is illuminated by light which gives a first-order diffraction angle of 34.0°. What i
lesya [120]
<h2>Answer: 745.59 nm</h2>

Explanation:

The diffraction angles \theta_{n} when we have a slit divided into n parts are obtained by the following equation:

dsin\theta_{n}=n\lambda (1)

Where:

d is the width of the slit

\lambda is the wavelength of the light  

n is an integer different from zero

Now, the first-order diffraction angle is given when n=1, hence equation (1) becomes:

dsin\theta_{1}=\lambda (2)

We know:

\theta_{1}=34\°

In addition we are told the diffraction grating has 750 slits per mm, this means:

d=\frac{1mm}{750}

Solving (2) with the known values we will find \lambda:

\lambda=(\frac{1mm}{750})sin(34\°) (3)

\lambda=0.00074559mm (4)

Knowing 1mm=10^{6}nm:

\lambda=745.59nm  >>>This is the wavelength of the light, wich corresponds to red.

6 0
3 years ago
What is the phase change called when a liquid changes to gas
Alexandra [31]
When a liquid changes to gas, this phase change is called vaporization or evaporization.
7 0
3 years ago
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How much time does it take a person to walk 12km north at the velocity at a velocity of 6.5 km/hrs?
alukav5142 [94]

"6.5 km/hr" is not a velocity.  It's just a speed, so
we don't know what direction he's walking.

If he happens to be walking north, then it takes him

               (12 km) / (6.5 km/hr)  =  1.846... hours  (rounded) .

If he's walking in any other direction, it takes him longer than that.

If the angle between north and the direction he's walking is
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6 0
3 years ago
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Describe how pieces of rope move as waves pass
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Maybe that'll help
6 0
3 years ago
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