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3 years ago

5

What is the unit for measuring energy

1 answer:

sdas [7]3 years ago

7 0

This would be called a Joule. The formula for energy is <span>P.E. = mgh (otherwise known as the gravitational force formula, which is energy.) M is the mass in kilograms, and G is the acceleration due to gravity, which is actually (9.</span>8 m / s2<span> at the surface of the earth.) I hope this helps! ~Mia</span>

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Common static electricity involves charges ranging from nanocoulombs to microcoulombs. How many electrons are needed to form a c

MA_775_DIABLO [31]

To solve this problem we will use the ratio given by the amount of total charge (q) equivalent to the individual charge of each electron (e) multiplied by the total number of electrons (n) present, that is,

$q = ne$

Here

q = Total charge

e = Electron charge

Our value of the charge is

$q = -2nC= -2*10^{-9}C$

We know that the charge in a electron is

$e = -1.6*10^{-19}C$

Replacing we have then

$(-2*10^{-9}) = n(-1.6*10^{-19})$

$n = \frac{-2*10^{-9}}{-1.6*10^{-19}}$

$n = 1.25*10^{10} electrons$

Therefore the number of electrons needed to form a charge of -2nC is $1.25*10^{10} electrons$

4 0

3 years ago

Liquids take the shape of the bottom of their container, while gases take the shape of their entire container. The shape solids

motikmotik

Answer:

...

Explanation:

sigh its not that hard

Any liquid takes form of the shape of the container it goes into.

Gasses take the form of the whole thing because it spreads throughout it.

Solids are already a shape so it cant take the shape of the container if it already has one. yk

4 0

3 years ago

Which is an example of a scientist using a conceptual model to describe a volcano?

Yuri [45]

I would say D would be the answer. but is this even a real like homework question

8 0

4 years ago

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While cooking dinner, Dinah's oven uses a 125.6 V line and draws 7.9 A of current

Kitty [74]

Current=I=7.9A
Voltage=V=125.6V

Resistance=R

Apply ohms law

$\\ \tt\hookrightarrow \dfrac{V}{I}=R$

$\\ \tt\hookrightarrow R=\dfrac{125.6}{7.9}$

$\\ \tt\hookrightarrow R=15.8\Omega$

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2 years ago

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A 8.10cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.710T pointing up.

lesya692 [45]

Answer:

The average induced emf in the coil is 20.19 mV

Explanation:

Given;

diameter of wire, d = 8.10cm = 0.081 m

initial magnetic field strength, B₁ = 0.71 T

final magnetic field strength , B₂= 0.24 T

time = 0.12 s

According to Faraday's law, average induced emf in the coil is directly proportional to the rate of change of flux.

$E.M.F= \frac{\delta \phi}{dt} = \frac{BA}{t}$

where;

A is the area of the wire = ¹/₄ (πd²)

= ¹/₄ (π x 0.081²) = 0.005154 m²

$E.M.F = \frac{(0.71-0.24)*0.0053}{0.12} =0.02019 \ V = \ 20.19 \ mV$

Therefore, the average induced emf in the coil is 20.19 mV

6 0

3 years ago