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ad-work [718]
3 years ago
11

Find the angle ϕ between the filter's polarizing axis and the direction of polarization of light necessary to increase the ratio

of the clouds' intensity to that of the blue sky so that it is three times the normal value. Express your answer in degrees to four significant figures.
Physics
1 answer:
nika2105 [10]3 years ago
3 0
D. that looks like a rubber band.
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Does anyone know how to do this?​
SIZIF [17.4K]

Explanation:

By Hooke's Law,

F=kx

The only force acting here is weight, and x is the extension of the string (you need to convert this to mm) so

mg=kx

(0.15)(9.81)=k ((420-300)x10^-3)

Then just solve this equation.

8 0
3 years ago
Which tricks do you use to reduce pressure in everyday activities? Which tricks do you use to reduce pressure in everyday activi
Molodets [167]

Answer:

same problem is here also bro i cannot find this plz help anyone

8 0
3 years ago
A 750-newton person stands in an elevator that is
blondinia [14]
When an elevator is accelerating downward, the normal force is equal to mg-ma (hence you feel a little lighter when accelerating downwards)

Therefore, the upward force of the elevator floor on the person must be less than 750N
8 0
3 years ago
4.00 kg glass coffee cup is 30.0°C at room temperature. It is then plunged into hot dishwater at a temperature of 90.0°C, as sho
statuscvo [17]

Answer:

Q = 200800 Joules.

Explanation:

Given the following data;

Mass = 4kg

Initial temperature = 30.0°C

Final temperature = 90.0°C

Specific heat capacity of glass = 837 J/kg°C

To find the quantity of heat absorbed;

Heat capacity is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 90 - 30

dt = 60°C

Substituting the values into the equation, we have;

Q = 4*837*60

Q = 200800 Joules.

Therefore, the amount of heat absorbed is 200800 Joules.

8 0
3 years ago
Use the work–energy theorem to solve each of these problems. You can use Newton’s laws to check your answers.A skier moving at 5
erastovalidia [21]

Answer:

Yo. what is the answer.

Explanation:

8 0
3 years ago
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