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zalisa [80]
3 years ago
5

Diffraction is observable when the opening is ______ than the wavelength.

Physics
2 answers:
masya89 [10]3 years ago
5 0
Diffraction is observable when the is smaller than the wavelength 
harkovskaia [24]3 years ago
5 0

Answer:

The opening needs to be smaller

Explanation:

Diffraction can be observed when the light passes through a grid or an opening that has a width of about the same size or smaller than the wavelength of the light that is being used.

We need the opening to be smaller than the wavelength so the bean can be splitted and we are able to see diffraction.

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A soccer ball of mass 0.4 kg is moving horizontally with a speed of 20 m/s when it is kicked by a player. The kicking force is s
amid [387]

Answer:

v_{f} = 74 m/s, F = 230 N

Explanation:

We can work on this exercise using the relationship between momentum and moment

        I = ∫ F dt = Δp

bold indicates vectors

we can write this equations in its components

X axis

       Fₓ t = m ( -v_{xo})

Y axis  

        t = m (v_{yf} - v_{yo})

in this case with the ball it travels horizontally v_{yo} = 0

Let's use trigonometry to write the final velocities and the force

        sin 30 = v_{yf} / vf

        cos 30 = v_{xf} / vf

        v_{yf} = vf sin 30

        v_{xf} = vf cos 30

         sin40 = F_{y} / F

         F_{y} = F sin 40

         cos 40 = Fₓ / F

         Fₓ = F cos 40

let's substitute

      F cos 40 t = m ( cos 30 - vₓ₀)

      F sin 40 t = m (v_{f} sin 30-0)

we have two equations and two unknowns, so the system can be solved

        F cos 40 0.1 = 0.4 (v_{f} cos 30 - 20)

        F sin 40 0.1 = 0.4 v_{f} sin 30

we clear fen the second equation and subtitles in the first

         F = 4 sin30 /sin40     v_{f}

         F = 3.111 v_{f}

        (3,111 v_{f}) cos 40 = 4 v_{f} cos 30 - 80

        v_{f} (3,111 cos 40 -4 cos30) = - 80

        v_{f} (- 1.0812) = - 80

        v_{f} = 73.99

        v_{f} = 74 m/s

now we can calculate the force

          F = 3.111 73.99

          F = 230 N

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3 years ago
You toss a ball in the air. what is the work done by gravity as the ball goes up?
jolli1 [7]

Answer: Gravity slows the ball down as it goes up and eventually stops it from going up and starts to pull it back down to earth.

Explanation:

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Answer:

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Explanation:

bi

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What change will most likely increase the strength of a magnetic field produced by an electromagnet? a. Reduce the number of tur
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Answer:

Option D

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