2 years ago

Electricity is one kind of

Physics

1 answer:

maw [93]2 years ago

3 0

Answer:

I think electricity is one kind of energy

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determine the force of gravitational attraction between a 78kg boy sitting 2 meters away from a 65kg girl.

bixtya [17]

Answer:

$F=8.45\times 10^{-8}\ N$

Explanation:

Given that,

Mass of a boy is 78 kg

Mass of a girl is 65 kg

We need to find the force of gravitational attraction between them if they are 2 m away.

The formula for the gravitational force is given by :

$F=\dfrac{Gm_1m_2}{r^2}\\\\F=\dfrac{6.67\times 10^{-11}\times 78\times 65}{(2)^2}\\\\=8.45\times 10^{-8}\ N$

So, the force between them is $8.45\times 10^{-8}\ N$ .

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2 years ago

Is tomato a fruit or veggie?

bonufazy [111]

Answer:

fruit

Explanation:

because its seeds are on the inside

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3 years ago

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A jet has amass of 40,000 kg. The thrust for each of the four engines is 20,000 N. What is the jet's acceleration?

BartSMP [9]

Answer:

2 m/s^2

Explanation:

Accelration=force/mass

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2 years ago

If you are building a house, which type of windows would you install in your bathroom so that you can have lots of light but pri

amm1812

A. Translucent because it’s shows a little light on the inside and looks dark on the outside

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3 years ago

It takes 4.0 eV to excite an electron in a box from the ground level to the first excited level. What is the width L of the box?

AveGali [126]

To solve this problem we will use the concept related to electrons in a box which determines the energy of an electron in that state.

Mathematically this expression is given by,

$E_n= \frac{n^2h^2}{8mL^2}$

Where,

m = mass of an electron

h = Planck's constant

n = is the integer number of the eigenstate

L = Quantum well width

The change in energy must be given in state 1 and 2, therefore

$\Delta E = E_2 - E_1$

$\Delta E = \frac{2^2h^2}{8mL^2}-\frac{1^2h^2}{8mL^2}$

$\Delta E = \frac{3h^2}{8mL^2}$

Replacing we have:

$(4*1.6*10^{-19}) = \frac{3(6.626*10^{34})}{8*(9.11*10^{-31})*L^2}$

$L = 0.53nm$

Therefore the correct answer is C.

6 0

3 years ago

Electricity is one kind of​

Electricity is one kind of