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4 years ago

For this time interval, find the x-component of the average velocity. express your answer using two significant figures.

Physics

1 answer:

Luba_88 [7]4 years ago

4 0

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A pressure of 400 Pa is applied to an area of 2.5 m2.What force applies this pressure?

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F = 400 Pa x 2.5 m2
F = 1 kN

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3 years ago

1 point

klio [65]

Answer:

100 g

100

200

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500

108

Explanation:

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3 years ago

If you put 120 volts of electricity through a pickle, the pickle will smoke and start glowing orange-yellow. The light is emitte

Alona [7]

Answer:

2.11eV

Explanation:

We know that speed of light is it's wavelength times frequency.

$\therefore f=v/\lambda\\=(3\times10^8m/s)/(589mm\times1m/1\times 10^9nm)\\=5.09\times10^1^4s^-1 \ or \ 5.09\times10^1^4Hz$

Planck's constant is $6.626\times 10^3^4Js$

The energy gap is calculated by multyplying the light's frequency by planck's constant:

$E_c=5.09\times10^1^4s^-^1\times 6.626\times10^-^3^4Js\\\\=3.37\times 10^-^1^9J \ \ \ \ \ \ #1eV=1.06\times 10^-^1^9J\\\\=2.11eV$

Hence, the energy gap is 2.11eV

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3 years ago

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How rolling friction is less than sliding friction?

vovangra [49]

Rolling friction is considerably less than sliding friction as there is no work done against the body that is rolling by the force of friction. For a body to start rolling a small amount of friction is required at the point where it rests on the other surface, else it would slide instead of roll.

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