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3 years ago

When light passes from a slower medium into a faster medium, which of the following explains what will occur?

Physics

2 answers:

spayn [35]3 years ago

6 0

Answer:

Explanation:

Lady bird [3.3K]3 years ago

5 0

Answer:

anser is c i just took test

Explanation:

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A cube of mass m1=9.6 kgm1=9.6 kg is sitting on top of a second cube of the same size and mass m2=0.8 kgm2=0.8 kg while both are

GalinKa [24]

Answer:N=0

Explanation:

Given

$m_1=9.6 kg$

$m_2=0.8 kg$

both blocks experiencing free fall so net weight of block during free fall is zero thus there is no normal reaction between them.

N=0

8 0

3 years ago

Three science questions help please!

Nimfa-mama [501]

6. D
7. D
8. B
let me know if you need clarification

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4 years ago

A uniform circular disk of moment of inertia 8.0 kg.m² is rotating at 4.0 rad/s. A small lump of mass 1.0 kg is dropped on the d

Mice21 [21]

Answer:

$\omega'=32\ rad.s^{-1}$

Explanation:

Given:

moment of inertial of a uniform circular disk, $I=8\ kg.m^2$

angular speed of rotation, $\omega=4\ rad.s^{-1}$

Mass of lump, $m'=1\ kg$

position of the lump from the center of the disk, $r'=1\ m$

<u>Using the conservation of the angular momentum:</u>

$I.\omega=I'.\omega'$

$8\times 4=m'.r'^2\times \omega'$

$32=1\times 1\times\omega'$

$\omega'=32\ rad.s^{-1}$

4 0

3 years ago

How do you convert from Celsius to Fahrenheit temperatures?

tino4ka555 [31]

It would be D. You have to multiply by 9/5, or 1.8, and then add 32.

Also, I have taken this quiz and passed it 100%!

4 0

3 years ago

Read 2 more answers

Water flows at speed v in a pipe of radius r. Neglecting viscosity, at what speed does the water flow through a constriction in

yan [13]

Answer:

Explanation:

Given that the water flows at speed v in a pipe of radius r.

Let $v_2$ is the speed of water flow where the radius of the pipe is r/3.

By using the continuity equation, the mass flow rate of water is the same at all the cross-sections of the pipe, wh have

$\rho_1A_1_v_1 =\rho_2A_2_v_2$

Where $\rho_1, A_1$ and $v_1$ are the density, area of the cross-section and speed at cross-section 1 and $\rho_2, A_2$ and $v_2$ are the density, area of the cross-section and speed at cross-section 2.

As the density of the water remains constant. so $\rho_1=\rho_2$ .

$\Rightarrow A_1_v_1 =A_2_v_2 \\\\\Rightarrow (\pi r^2)v=(\pi (r/3)^2v_2 \\\\\Rightarrow r^2v=\frac {r^2}{9}\times v_2 \\\\\Rightarrow v= \frac {v_2}{9} \\\\\Rightarrow v_2=9v.$

Hence, the speed of the water flow where the radius is r/3 is $9v$ .

6 0

3 years ago