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REY [17]
4 years ago
10

Light strikes a 5.0-cm thick sheet of glass at an angle of incidence in air of 50°. The sheet has parallel faces and the glass h

as an index of refraction 1.50. What is the angle of refraction in the glass?
Physics
1 answer:
xxMikexx [17]4 years ago
3 0

Answer:

30.81°

Explanation:

θ₁ = angle of incidence = 50°

θ₂ = Angle of refraction

n₂ = Refractive index of glass = 1.5

n₁ = Refractive index of air = 1.0003

From Snell's Law

Using Snell's law as:

n_1\times {sin\theta_1}={n_2}\times{sin\theta_2}

1.0003\times {sin50}={1.50}\times{sin\theta_2}

Angle of refraction= sin⁻¹ 0.5122 = 30.81°.

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Can someone please help me. idk what to do​
Alex_Xolod [135]

Answer:

-4.5 m/s

Explanation:

Even without doing calculations, we know that a projectile has the same speed coming down as it did going up at the same height.  Since it went up at 4.5 m/s, it returns down at -4.5 m/s.

To prove it with math, use the given information:

v₀ = 4.5 m/s

a = -9.8 m/s²

Δy = 0 m

Find: v

v² = v₀² + 2aΔy

v² = (4.5 m/s)² + 2 (-9.8 m/s²) (0 m)

v = -4.5 m/s

3 0
4 years ago
Thanks for helping me
allsm [11]

Answer:

A) An organism with favorable genetic variation will tend to survive and breed successfully.

Explanation:

In an ecosystem, organisms that don't have the best genetic variation will die off, leaving the more genetic favored ones to survive and become better as a whole.

6 0
3 years ago
Read 2 more answers
How fast must a 1000 kg car be moving to have a kinetic energy of:
VMariaS [17]

Answer:

\mathrm{(a)}\: 2\: \mathrm{m/s}\\\mathrm{(b)}\: 20\: \mathrm{m/s}\\

Explanation:

The kinetic energy of an object is given by KE=\frac{1}{2}mv^2 where m is the mass of the object and v is the velocity of the object.

We can set up the following equations with the information given:

\mathrm{(a)}\: 2.0\cdot 10^3=\frac{1}{2}\cdot 1000\cdot v^2, \\v=\fbox{$2\: \mathrm{m/s}$}

For part B, we have the same equation, but kinetic energy is now 2.0\cdot 10^5.

Therefore:

\mathrm{(b)}\: 2.0\cdot 10^5=\frac{1}{2}\cdot 1000\cdot v^2, \\v=\fbox{$20\: \mathrm{m/s}$}.

6 0
3 years ago
the particles of an object are packed tightly together and are vibrating. when the object is heated, the particles start to move
eimsori [14]
This is an example of state change from solid to liquid.
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3 years ago
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1.45 L of 16°C water is placed in a refrigerator. The refrigerator's motor must supply an extra 10.7 W power to chill the water
Vika [28.1K]

Answer:

The coefficient of performance of the refrigerator is 2.251.

Explanation:

In this case, the coefficient of performance of the refrigerator (COP), no unit, is equal to the ratio of the heat rate received from the water to the power needed to work, that is:

COP = \frac{\dot Q_{L}}{\dot W} (1)

COP = \frac{\rho\cdot V\cdot c_{w}\cdot \Delta T}{\dot W \cdot \Delta t} (2)

Where:

\dot Q_{L} - Heat rate received from the water, in watts.

\dot W - Power, in watts.

\rho - Density of water, in kilograms per cubic meter.

V - Volume of water, in cubic meters.

c_{w} - Specific heat of water, in joules per kilogram-degree Celsius.

\Delta T - Temperature change, in degrees Celsius.

\Delta t - Cooling time, in seconds.

If we know that \rho = 1000\,\frac{kg}{m^{3}}, V = 1.45\times 10^{-3}\,m^{3}, c_{w} = 4187\,\frac{J}{kg\cdot ^{ \circ}C}, \Delta T = 10\,^{\circ}C, \dot W = 10.7\,W and \Delta t = 2520\,s, then the coefficient of refrigeration of the refrigerator is:

COP = \frac{\rho\cdot V\cdot c_{w}\cdot \Delta T}{\dot W \cdot \Delta t}

COP = 2.251

The coefficient of performance of the refrigerator is 2.251.

6 0
3 years ago
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