An electrical connection between an electrical circuit or equipment and the earth is called a

1 answer:

3 0

I'd say ground. <span>Voltage in the US is 110-120 volts while in other countries it is 220-240 volts. if you have a 110-120 volt appliance, you need a step-up transformer (110 to 220)before you could use it in a 220 volt power supply.</span>

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Air in a thundercloud expands as it rises. If its initial temperature is 292 K and no energy is lost by thermal conduction on ex

tiny-mole [99]

Answer:

Explanation:

It is a case of adiabatic expansion .

$T_1V_1^{\gamma-1}=T_2V_2^{\gamma-1}$

T₁ , T₂ are initial and final temperature , V₁ and V₂ are initial and final volume.

Given ,

V₂ = 3 V₁ and T₁ = 292 . γ for air is 1.4 .

$( 3 )^{\gamma-1}= \frac{292}{ T_2}$

$( 3 )^{1.4-1}= \frac{292}{ T_2}$

1.552 = 292 / T₂

T₂ = 188 K .

3 0

3 years ago

What is the momentum of a 10kg ball moving at a velocity of 4m/s east?

Katyanochek1 [597]

Answer:

40 kg.m/s

Explanation:

Momentum, p is defined as the product of mass and velocity of an object. Numerically, it is represented as, p=mv where m is mass of the object and v is the velocity in which the object moves, with keen observation on the direction before and after collision. Substituting 10 kg for m and 4 m/s for v then momentum, P=10*4=40 kg.m/s

6 0

3 years ago

Please I need your help

frez [133]

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3 years ago

Match the scientific terms with their definitions . Please help me

melisa1 [442]

In order:
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4 0

3 years ago

Determine the index of refraction of glass that is struck by unpolarized light at 53.8 degrees and resulting in a fully polarize

nignag [31]

Answer:

The refractive index of glass, $\mu_{g} = 1.367$

Solution:

Brewster angle is the special case of incident angle that causes the reflected and refracted rays to be perpendicular to each other or that angle of incident which causes the complete polarization of the reflected ray.

To determine the refractive index of glass:

$tan\theta_{P} = \frac{\mu_{g}}{\mu_{a}}$ (1)