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garik1379 [7]
2 years ago
5

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:

ssssssssssssssssssssssssssssssssssssss

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Im sure the answer is letter B
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A spring 1.50 m long with force constant 448 N/m is hung from the ceiling of an elevator, and a block of mass 10.9 kg is attache
GuDViN [60]

Answer:

Explanation:

Let the extension in the spring be x .

restoring force = weight of block

kx = mg

x = \frac{10.9\times9.8}{448}

= 23.84 cm

b )

When the elevator is going upwards

Restoring force = mg + ma

k x₁ = 10.9 ( 9.8 + 1.89 )

x₁ = 28.44 cm

( y coordinate will  be - ( 28.44 - 23.84 ) = - 4.6 cm )

c ) When the cable snaps , both elevator and block undergo free fall . In this case apparent g = 0

Since the spring is stretched by 28.44 cm , a restoring force continues to act on the block which is equal to

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= 127.41 N

So a net acceleration a will act on the block

a = 127.41 / 10.9

= 11.68 m / s²

The block will undergo SHM with amplitude equal to 28.44 cm .

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3 years ago
How do I write an essay on how I feel about online school​
vlabodo [156]

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Some students appreciated the social aspect of Zoom classrooms, while others felt online education worked best for them when they were working on their own. ... Students said they appreciated having a well-planned work week and didn't appreciate “surprise” assignments online any more than they appreciate them in class

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Current can vary in different branches of a circuit

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Why should a rain gauge be raised 30cm above the ground​
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