3 years ago

An object falls from rest at a rate of 10 m/s / s . How fast was it traveling after 5 seconds of fall?

Physics

1 answer:

Vesna [10]3 years ago

7 0

Answer:

$v = u + at \\ v = 10 + 9.81 \times 5 \\ v = 59.05m {s}^{ - 1}$

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A stone tied at one end of the string is whirled in vertical circle, where is the tension in the string be maximum and minimum?

Ber [7]

<h3>answer</h3>

The minimum velocity required for a object to rotate in a verticle plane is v

gr.

So, at bottom point, T

max

=mv

/r+mg=6mg.

At top-most point velocity is v

=gr.

So, T

min

=mv

/r−mg=0

So T

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The energy of the electron in Hydrogen atom can be shown to be given by En = -13.6/n^2 eV, where n represents the principal quan

Tpy6a [65]

Answer:

This represents radiation in ultra-violet region .

Explanation:

Energy of the orbit where n = 3 is given as follows

$E_3 =- \frac{13.6 }{3^2}$

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Energy of the orbit where n = 1 is given as follows

$E_1 =- \frac{13.6 }{1^2}$

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Difference of [tex]E_3 and [tex]E_1 = - 1.511+ 13.6

= 12.089 eV.

The wavelength of light having this energy in nm is given by the expression as follows

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If the box is moving at constant velocity, net force must be zero, so:

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