Which path would the laser take when entering the water from air? <br> brown or black

A small plastic ball with a mass of 7.10 x 10⁻³ kg and with a charge of +0.161 µC is suspended from an insulating thread and han

GuDViN [60]

Answer:

$3.16097\times 10^{-8}\ C$

Explanation:

T = Tension on the string

E = Electric field

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

As the forces balance themselves we have the equations

$Tcos30=mg$

$Tsin30=Eq$

Dividing the equations we get

$tan30=\dfrac{Eq}{mg}\\\Rightarrow E=\dfrac{mgtan30}{q}\\\Rightarrow E=\dfrac{7.1\times 10^{-3}\times 9.81tan30}{0.161\times 10^{-6}}\\\Rightarrow E=249770.33291\ N/C$

Electric field is given by

$E=\dfrac{Q}{A\epsilon}\\\Rightarrow Q=EA\epsilon\\\Rightarrow Q=249770.33291\times 0.0143\times 8.85\times 10^{-12}\\\Rightarrow Q=3.16097\times 10^{-8}\ C$

The magnitude of the charge on each plate is $3.16097\times 10^{-8}\ C$

6 0

3 years ago

You can switch the polarity of the bar magnet by clicking on the button with the bar magnet and two semi-circular arrows on the

lana [24]

The effect that is seen is that the brightness of the bulb is unaffected by switching the polarity of the magnet; however, the order in which the needle deflects on the voltmeter is flipped when you do so.

This is further explained below.

<h3>What is switching the polarity?</h3>

Generally, When the polarity is reversed, both the hot wire and the neutral wire are switched, which causes the electric current to flow in the opposite direction. Because of this, the electric current enters the appliance through the neutral terminal rather than the hot terminal, which energizes the appliance even when it is turned off.

In a worst-case scenario, the battery's shell might burst apart due to the heat generated by the polarity reversal, which would release hydrogen gas, which is flammable. Acid from the battery may leak out of the box and burn you or damage your expensive electronics.

In conclusion, In this case, reversing the magnet's polarity has no impact on the light output of the bulb, but it does reverse the direction of the voltmeter's needle deflection.

Read more about switching the polarity

brainly.com/question/14600686?

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7 0

2 years ago

Which statement best describes what happens during a chemical change?

nevsk [136]

Answer:both the identity and the property of the substance Change

Explanation:both the identity and the property ot the substance Change

7 0

4 years ago

Knowing that the speed of light in the vitreous humor is 2.1 × 108 m/s, what is the index of refraction of the vitreous humor? (

shusha [124]

Answer:

n = 1,429

Explanation:

In this exercise you are asked to calculate the refractive index, it is a constant that depends on the wavelength and relates the behavior of light when passing through two different material media.

The refractive index of a material is given by

n = c / v

where n is the refractive index, c the speed of light and v the speed in the material medium

let's calculate

n = 3.0 108 / 2.1 108

n = 1,429

8 0

3 years ago

If light energy to electric energy conversion using solar cells is 12 % efficient, how many square miles of land must be covered

umka2103 [35]

Complete Question

The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ . The average rate of electric energy consumption in one house is 1.0 kW .

If light energy to electric energy conversion using solar cells is 12 % efficient, how many square miles of land must be covered with solar cells to supply the electrical energy for 350000 houses? Assume there is no cloud cover.

Answer:

The area is $A = 1.26 *10^{7} m^2$