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Alinara [238K]
4 years ago
9

Three polarizing filters are stacked, with the polarizing axis of the second and third filters at angles of 23.8 ∘ and 65.0 ∘, r

espectively, to that of the first. If unpolarized light is incident on the stack, the light has an intensity of 71.5 W/cm2 after it passes through the stack.
a) If the incident intensity is kept constant, what is theintensity of the light after it has passed through the stack if thesecond polarizer is removed?
Physics
1 answer:
GalinKa [24]4 years ago
4 0

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It helps the cell by making sure everything gets circulated throughout the cell.
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3 years ago
In the Electromagnetic Force, opposite charges will ________.
kiruha [24]
-- Charges with the same sign repel each other.

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A disk-shaped platform has a known rotational inertia. The platform is mounted on a fixed axle and rotates in a horizontal plane
Nataly [62]

The frictional torque exerted on the platform by the axle as the platform rotates will be;

\rm T_f \theta =\frac{1}{2} I [\omega^2-\omega_0^2]

<h3>What is torque?</h3>

Torque is the force's twisting action about the axis of rotation. Torque is the term used to describe the instant of force. It is the rotational equivalent of force. Torque is a force that acts in a turn or twist.

The amount of torque is equal to force multiplied by the perpendicular distance between the point of application of force and the axis of rotation.

Work done by the frictional torque = Change in the rotational kinetic energy of the wheel

\rm T_f \theta =\frac{1}{2} I [\omega^2-\omega_0^2]

Where,

\rm T_f is the frictional torque

\rm \omega is the final angular velocity

\rm  \omega_0 is the initial angular velocity

\rm \theta is the angular displacement

Hence, the frictional torque exerted on the platform by the axle as the platform rotates will be;

\rm T_f \theta =\frac{1}{2} I [\omega^2-\omega_0^2]

To learn more about the torque, refer to the link;

brainly.com/question/6855614

#SPJ1

5 0
2 years ago
Electromagnets 23. To hold fire doors open, an electromagnet is switched on, generating a magnetic field If a solenoid is 2.00 c
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0.0478 T

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B = \mu _{0}ni

Where, n be the number of turns per unit length

n = N / L = 400 / 0.02 = 20,000

B = 4\pi \times 10^{-7}\times 20000\times 1.9

B = 0.0478 T

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Which of the following is not a benefit of improved cardio-respiratory fitness?
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Reduced HDL cholesterol

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