2 years ago

Why a plastic pen which is rubbed with hair,is able to attract small pieces of papers

Physics

1 answer:

AURORKA [14]2 years ago

5 0

Answer:

Explanation:

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Which of the following is not an example of centripetal acceleration?

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An apple falling to the ground is not an example of centripetal acceleration.

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3 years ago

The collision between a hammer and a nail can be considered to be approximately elastic. estimate the kinetic energy acquired by

Setler [38]

Here we can use momentum conservation as in this type of collision there is no external force on it

$m_1v_{1i} + m_2v_{2i} = m_1 v_{1f} + m_2v_{2f}$

now here we can say

$m_1 = 10 g$

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$m_2 = 550 g$

$v_{2i} = 3.5 m/s$

now here we can say

$10*0 + 550 * 3.5 = 10 v_{1f} + 550 v_{2f}$

$192.5 = v_{1f} + 55 v_{2f}$

now by coefficient of restitution

for elastic collision we know that e = 1

$v_{2f} - v_{1f} = e(v_{1i} - v_{2i})$

$v_{2f} - v_{1f} = 0 - 3.5$

now by solving the two equation

$56v_{2f} = 189$

$v_{2f} = 3.375 m/s$

also we know that

$v_{1f} = v_{2f} + 3.5 = 3.375 + 3.5 = 6.875 m/s$

so final speed of the nail is 6.875 m/s

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2 years ago

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a car advertisement claims their car can go from a stopped position to move 60 miles per hour in 5 seconds the advertisement is

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What do you want us to anwser

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3 years ago

According to the photon energy formula, tripling the frequency of the radiation from a monochromatic source will change the ener

Harrizon [31]

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By a factor of 3

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In the photon energy formula , frequency and the energy content have a direct relationship. This means anything that is done to one of the parameters is the same that will be done to the other to have a balance.

In this equation: Energy=plank’s constant * frequency.

Energy is directly proportional to frequency.

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3 years ago

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Scientists often say that light and other forms of electromagnetic radiation have a dual nature

Alex

Answer:

Behaves as a wave.

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The dual nature of light means that light behaves as a wave. If the light consisted of small particles, the alternating light and dark bands would not have occurred.

Sometimes it behaves like a particle (called a photon), which explains how light travels in straight lines.

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3 years ago

Why a plastic pen which is rubbed with hair,is able to attract small pieces of papers​

Why a plastic pen which is rubbed with hair,is able to attract small pieces of papers