1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Otrada [13]
3 years ago
8

The average intensity of light emerging from a polarizing sheet is 0.708 W/m2, and that of the horizontally polarized light inci

dent on the sheet is 0.960 W/m2. Determine the angle that the transmission axis of the polarizing sheet makes with the horizontal.
Physics
1 answer:
Pachacha [2.7K]3 years ago
4 0

Answer:

Angle θ = 30.82°

Explanation:

From Malus’s law, since the intensity of a wave is proportional to its amplitude squared, the intensity I of the transmitted wave is related to the incident wave by; I = I_o cos²θ

where;

I_o is the intensity of the polarized wave before passing through the filter.

In this question,

I is 0.708 W/m²

While I_o is 0.960 W/m²

Thus, plugging in these values into the equation, we have;

0.708 W/m² = 0.960 W/m² •cos²θ

Thus, cos²θ = 0.708 W/m²/0.960 W/m²

cos²θ = 0.7375

Cos θ = √0.7375

Cos θ = 0.8588

θ = Cos^(-1)0.8588

θ = 30.82°

You might be interested in
A charge of 6.7 × 10^-15 coulombs is located at a point where its potential energy is 5.6 × 10^-12 joules. What is the electric
natita [175]

Answer:

C. 8.4 × 10^2 volts

Explanation:

The potential energy of a charge is given by:

U=qV

where

q is the magnitude of the charge

V is the electric potential

In this problem, we have

q=6.7\cdot 10^{-15} C is the charge

U=5.6\cdot 10^{-12} J is the potential energy

Re-arranging the formula and using these numbers, we can find the electric potential:

V=\frac{U}{q}=\frac{5.6\cdot 10^{-12} J}{6.7\cdot 10^{-15} C}=835.8 V = 8.4\cdot 10^2 V

4 0
3 years ago
Read 2 more answers
A physics professor is pushed up a ramp inclined upward at an angle 33.0° above the horizontal as he sits in his desk chair tha
Andru [333]

Answer:

2.51 m/s

Explanation:

Parameters given:

Angle, A = 33°

Mass, m = 90kg

Inclined distance, D = 2m

Force, F = 600N

Initial speed, u = 2.3m/s

From the relationship between work and kinetic energy, we know that:

Work done = change in kinetic energy

W = 0.5m(v² - u²)

We also know that work done is tẹ product of force and distance, hence, net work done will be the sum of the total work done by the force from the students and gravity.

Hence,

W = F*D*cosA - w*D*sinA

w = m*9.8 = weight

=> W = 600*2*cos33 - 90*9.8*2*sin33

W = 45.7J

=> 45.7 = 0.5*m*(v² - u²)

45.7 = 0.5*90*(v² - 2.3²)

45.7 = 45(v² - 5.29)

=> v² - 5.29 = 1.016

v² = 6.306

v = 2.51 m/s

The final velocity is 2.51 m/s

7 0
3 years ago
Read 2 more answers
A student wants to determine the coefficient of static friction μ between a block of wood and an adjustable inclined plane. Of t
Cloud [144]

Answer:

A protractor to measure the angle of the inclined plane with the horizontal

Explanation:

The student needs to lift the free end of the adjustable inclined plane until the object barely starts sliding, and measure the angle at which such happens. At that point, the force of friction equals the component of the weight in the direction of the incline. That is:

f=\mu\,* N = \mu * m g\, cos(\theta)

and  w_{//}= m\,g\,sin(\theta)

Then  

f = w_{//}\\\mu *\,m \,g\,cos(\theta) = m\,g\,sin(\theta)\\\mu = tan(\theta)

and therefore, the coefficient of static friction is fully determined just by calculating the tangent of the angle that the incline forms with the horizontal.

Then the only extra instrument needed is a protractor to measure the angle.

7 0
3 years ago
Match words at the left to the correct blanks in the sentences on the right. Not all words will be used.1. The energy that drive
beks73 [17]

Answer:

In what way is iron unique among the elements?

It has the lowest mass per nuclear particle.

Match words at the left to the correct blanks in the sentences on the right. Not all words will be used.

-The energy that drives the expansion of a star into a subgiant or red giant comes from HYDROGEN SHELL FUSION

-Stars with mass greater than about 8 solar masses are considered HIGH-MASS STARS

-The final stage of core fusion in a low-mass star is HELIUM FUSION

-Stars that are fusing hydrogen in their cores are MAIN-SEQUENCE STARS

-When it dies, a high-mass star explodes as a SUPERNOVA

-A star that is expanding (into a subgiant and then a giant) has a(n) INERT HELIUM CORE

-When it dies, a low-mass star expels a PLANETARY NEBULA

-Stars with masses less than about two solar masses are considered LOW-MASS STARS

4 0
3 years ago
Which of the following scenarios describes a condition in which resonance can occur? A. Two tuning forks that vibrate at the sam
Vlad1618 [11]

Answer:

The correct answer is A

Explanation:

  • Resonance is the condition when the frequency of a object vibrating at a frequency due to action of force is equal with the natural frequency of another object and the system starts to vibrate with higher frequency and amplitude than the frequency of the object subjected to external force.
  • Resonance occur when two tuning forks vibrating at a same frequency are brought close to each other as described in option A.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Explain how the pressure at the bottom of a container depends on the container shape and the fluid height
    10·1 answer
  • Erica throws a tennis ball against a wall, and it bounces back. Which force is responsible for sending the ball back to Erica?
    9·2 answers
  • Mark all the quarks.a) Proton b) Electron c)Anti-top d) Gluon e) Tau Neutrino
    15·1 answer
  • A metallic sheet has a large number of slits, 5.0 mm wide and 20 cm apart, and is used as a diffraction grating for microwaves.
    5·1 answer
  • Which statement about an atom is correct?
    9·1 answer
  • You are asked to determine the density of a liquid. What lab equipment is most helpful to find density of the liquid?
    11·2 answers
  • During a football game, a receiver has just caught a pass and is standing still. Before he can move, a tackler, running at a vel
    14·1 answer
  • A vector has components x=6 m and y=8 m. what is its magnitude and direction?
    9·1 answer
  • If you applied a force of 200 Newtons to lift a box 2.20 meters above the floor, how much work would you be doing?
    6·1 answer
  • Determine the value of the resultant and its location from O.<br>see attach image.​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!