The hockey stick hits the puck forward. Give the reaction force

Unpolarized light with intensity S is incident on a series of polarizing sheets. The first sheet has its transmission axis orien

jeka94

Answer:

Explanation:

Given

Initial Intensity of light is S

when an un-polarized light is Passed through a Polarizer then its intensity reduced to half.

When it is passed through a second Polarizer with its transmission axis $\theat =45^{\circ}$

$S_1=S_0\cos ^2\theta$

here $S_0=\frac{S}{2}$

$S_1=\frac{S}{2}\times \frac{1}{(\sqrt{2})^2}$

$S_1=\frac{S}{4}$

When it is passed through third Polarizer with its axis $90^{\circ}$ to first but $\theta =45^{\circ}$ to second thus $S_2$

$S_2=S_0\cos ^2\theta$

$S_2=\frac{S}{4}\times \frac{1}{2}$

$S_2=\frac{S}{8}$

When middle sheet is absent then Final Intensity will be zero

3 0

3 years ago

What is the difference between condensation and precipitation

Alexxandr [17]

Explanation:

The water cycle is based on three parts;

1. Evaporation

2. Condensation

3. Participation

Condensation:

It is the process in which water vapor changes into liquid water or in other words, it is the transition from the gaseous state to liquid state.

Precipitation:

It is the process in which any liquid or frozen water such as snow that forms in the atmosphere and falls back to the Earth

Condensation depends on temperature and pressure whereas precipitation depends on the temperature and the concentration of the solution.

3 0

3 years ago

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A boy weighs 400N. what is his mass?

Basile [38]

≈40.8kg

this is to take up space

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

m

=

W

g

=

400

N

9.8

m/s

2

≈

40.8

kg

4 0

3 years ago

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An artillery shell of mass 30 kg has a velocity of 250 m/s vertically upward. The shell explodes into two pieces; immediately af

olga_2 [115]

Answer:

9654.34 m

Explanation:

from conservation of momentum

$\begin{aligned}30 \times 250 &=-10 \times 120+20 \times V \\20 V &=30 \times 250+10 * 120 \\V &=\frac{30 \times 250+10 \times 120}{20}=435 \mathrm{~m} / \mathrm{s}\end{aligned}$

And from Conservation of Energy

$\frac{1}{2} m v^{2}=m g h\\h=\frac{v^{2}}{2 g}\\h=\frac{(435(m/s))^{2}}{2 \times 9.8(m/s^{2} )}\\h=9654.34 (m)$

7 0

2 years ago

Which of the following is not accurate when describing solids? A. Solids are better conductors of heat than liquids B. The amoun

Elza [17]

B. The amount of pressure exerted by a solid is solely dependent on its mass
i just took the test

3 0

3 years ago

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