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Reptile [31]
3 years ago
9

I REALLY NEED HELP!!!!

Physics
1 answer:
Katarina [22]3 years ago
4 0

Answer:

400 Ns

Explanation:

Impulse = Change in momentum

i.e I = ΔP

So that,

Impulse experienced by Max = Change in Max's momentum

Change in Max's momentum = m(v - u)

Where m is the mass, v is the velocity after collision, and u is the velocity before collision.

m = 100.0 kg, v = 2.0 m/s, u = 6.0 m/s

Change in Max's momentum = 100 x (2 -6)

                             = -400 kg m/s

The negative sign shows that the change in momentum was against his direction of motion.

Impulse experienced by Max = 400 Ns.

Thus,

Max experienced an impulse of 400 Ns as a result of the collision.

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Explanation:

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The initial velocity of the ball, u = 4.1 m/s

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<h3><u>Answer;</u></h3>
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Complete Question

A thin film of cooking oil (n=1.43) is spread on a puddle of water (n=1.34). What is the minimum thickness Dmin of the oil that will strongly reflect blue light having a wavelength in air of 451 nm, at normal incidence? Dmin= nm What are the next three thicknesses that will also strongly reflect blue light of the same wavelength, at normal incidence?

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b)   237 nm, 394 nm, and 552 nm

c)   473 nm, 788 nm, and 1100 nm

d)  361 nm, 602 nm, and 842 nm

e)  315 nm, 473 nm, and 631 nm

Answer:

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The correct option is B

Explanation:

  From the question we are told that

      The refractive index of cooking oil is n _c = 1.43

       The refractive index of water is n_w = 1.34

      The  wavelength of reflection is is  \lambda _ r = 451nm

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         t =  \frac{(m + \frac{1}{2} \lambda ) }{2 n}

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