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3 years ago

What are the solar cells made of

1 answer:

7 0

Solar cells are classified into first, second and third generation cells. The first generation cells—also called conventional, traditional or wafer-based cells—are made of crystalline silicon<span>, the commercially predominant PV technology, that includes materials such as </span>polysilicon <span>and mono crystalline </span>silicon<span>.</span>

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A large storage tank, open to the atmosphere at the top and filled with water, develops a small hole in its side at a point 15.6

VladimirAG [237]

To solve this problem it is necessary to take into account the kinematic equations of motion and the change that exists in the volume flow.

By definition the change in speed is given by

$v_f^2-v_i^2 = 2ax$

Where,

x= distance

$v_f =$ final velocity

$v_i =$ initial velocity

a = acceleration

On the other hand we know that the flow of a fluid is given by

$\dot{V} = Av$

Where,

A = Area

v = Velocity

PART A )

Applying this equation to the previously given values we have to

$v_f^2-v_i^2 = 2ax$

$v_f^2-0 = 2*(9.8)(15.6)$

$v_f^2=305.76$

$v_f = 17.48$

Therefore the velocity of the water leaving the hole is 17.48m/s

PART B )

In the case of the hole we take the area of a circle, therefore replacing in the flow equation we have to,

$\dot{V} = \pi r^2 v$

$r = \sqrt{\frac{\dot{V}}{\pi v}}$

$r = \sqrt{\frac{3*10^{-3}*\frac{1}{60}}{\pi (17.48)}$

$r = \sqrt{9.10*10^{-7}}$

$r = 0.54*10^{-4}$

The diameter is 2 times the radius, then is $1.91*10^{-3}$ m or 1.91mm

<em>Note: The rate flow was converted from minutes to seconds.</em>

8 0

3 years ago

The wavelength of light in a medium is ____ the wavelength of light in a vacuum. Question 10 options: longer than shorter than e

Nookie1986 [14]

Answer:

Explanation:

Shorter than is the answer. Correct on the test!

7 0

3 years ago

In any vector space au=bu implies a=b ? Trou or False

mixas84 [53]

Answer:

False

Explanation:

(I guess if it were written "properly" it would be ax=bx implies a=b).

Given the axioms we were given, it would seem that the statement should be true, no?

A related statement -- also listed as false -- is that "in any vector space, ax=ay implies that x=y." Again, given the axioms we have.

5 0

3 years ago

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The energy flow to the earth from sunlight is about 1.40 kw/m2 . part a find the maximum value of the electric field for a sinus

Lilit [14]

Energy ,E= Sqrt{Energy intensity*Speed of light*Magnetic constant}

Where,
Energy intensity = 1.40 kW/m^2 = 1400 W/m^2
Speed of light = 3*10^8 m/s
Magnetic constant = 4pi*10^-7 H

Therefore,
E= Sqrt{1400*3*10^8*4*pi*10^-7} = 726.49 v/m

Now,
Emax = E*sqrt (2) = 726.49*Sqrt(2) = 1027.41 v/m

6 0

4 years ago

An object moves 4 meters north, then 3 meters east. What is the displacement of the object?

Lady bird [3.3K]

The displacement of the object that moved 4 meters north, then 3 meters east is 5 meters.

<h3>What is displacement?</h3>

Displacement is change in the position of an object. It can be described as the shortest distance between the initial and final position of an object.

The displacement of the object is calculated as follows;

d² = 4² + 3²

d² = 25

d = 5 m

Thus, the displacement of the object that moved 4 meters north, then 3 meters east is 5 meters.

Learn more about displacement here: brainly.com/question/2109763

#SPJ2

4 0

2 years ago

Read 2 more answers