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3 years ago

Explain how a single piece of polarizing film can be used to adjust the intensity of a beam of light..

Physics

1 answer:

masya89 [10]3 years ago

6 0

Answer:

Sunlight and almost every other form of natural and artificial illumination produces light waves whose electric field vectors vibrate in all planes that are perpendicular with respect to the direction of propagation.

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You are reviewing your results from an experiment involving a soccer ball being kicked. You claimed that, "unbalanced

ludmilkaskok [199]

Answer:

A is the answer

Explanation:

come on man

8 0

3 years ago

why is the freezer compartment of a refrigerator kept at the top in terms of conduction convection and radiation

Ulleksa [173]

Answer:

The freezer compartment is at the top of a fridge because cool air sinks. (convection current)

Explanation:

4 0

2 years ago

El muelle de un dinamómetro se alarga 6cm cuando aplicamos sobre él una fuerza de 10 N. Calcula el alargamiento del muelle al ap

Crank

Answer:

x = 12cm

Explanation:

First, with the values given for the force and the displacement, you calculate the spring-constant of the dynamometer by using the following equation (primero, con los valores dados de la fuerza y el desplazamiento, calculas la constante del resorte aplicando la siguiente formula):

$F=kx$

F: force (fuerza) = 10N

k: spring constant (constante del resorte)

x: displacement of the spring (desplazamiento del resorte) = 6cm

by using these values you calculate k (usando estos valores calculas k):

$k=\frac{F}{x}=\frac{10N}{6cm}=1.66\frac{N}{cm}$

With this value you calculate the displacement for a force of 20N (con este valor de k calculas el desplazamiento del resorte para una fuerza de 20N):

$x=\frac{F}{k}=\frac{20}{1.66N/cm}=12cm$

hence, the displacement is 12cm

6 0

4 years ago

At which position is the kinetic energy of a particle executing SHM greatest?

Over [174]

Explanation:

The kinetic energy of a particle in SHM is given by :

$K=\dfrac{1}{2}m\omega^2(A^2-x^2)$

Where

m is the mass of a particle

A is the amplitude

x is the distance

$\omega$ is the angular frequency

The kinetic energy of a particle executing SHM is maximum at its equilibrium position and minimum at a maximum displacement from the equilibrium point.

8 0

3 years ago

A boy takes hold of a rope to pull a wagon (m = 50 kg) on a surface with a static coefficient of friction μS = 0.25. Calculate t

vivado [14]

Answer:

<em>The force that would be applied on the rope just to start moving the wagon is 122 N</em>

Explanation:

Frictional force opposes motion between two surfaces in contact. It is the force that must be applied before a body starts to move. Static friction opposes the motion of two bodies that are in contact but are not moving. The magnitude of static friction to overcome for the body to move can be calculated using equation 1.

F = μ x mg .............................. 1

where F is the frictional force;

μ is the coefficient of friction ( μs, in this case, static friction);

m is mass of the object and;

g is the acceleration due to gravity( a constant equal to 9.81 m/ $s^{2}$ )

from the equation we are provide with;

μs = 0.25

m = 50 kg

g = 9.81 m/ $s^{2}$

F =?

Using equation 1

F = 0.25 x 50 kg x 9.81 m/ $s^{2}$

F = 122.63 N

<em>Therefore a force of 122 N must be applied to the rope just to start the wagon.</em>

6 0

3 years ago

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