3 years ago

Which is an example of a screw? Lightbulb,ladder,screwdriver,flag pole

Physics

1 answer:

Andrei [34K]3 years ago

4 0

screwdriver :)

hope you'll give a good review!

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Which statement best describes metallic bonding

horrorfan [7]

Answer:

It's a type of chemical bonding that rises from the electrostatic attractive force between conduction electrons and positively charged metal bars. It can also be described as the sharing of free electrons among a structure of positively charged ions

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B- Energy!
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Which of the following statements concerning the nuclear force is false? O The nuclear force is attractive and not repulsive. O

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Answer:

The nuclear force is attractive and not repulsive.
The nuclear force is very weak and much smaller in relative magnitude than the electrostatic and gravitational forces.

Explanation:

Nuclear force is the strongest existing force in the nature.

It has the shortest range.

Its main function is to hold the subatomic particles together in nature.

The nuclear force is created by the exchange of pi mesons between the nucleons of an atom, but for this exchange to happen the particles must be close to one another of the order of few femtometer.

At about 1 femtometer the nuclear force is very strongly attractive in nature but at distance greater than 2.5 femtometer it fades away.

The force becomes repulsive in nature at distance less than 0.7 femtometer.
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3 years ago

A 250 kg car has 6875 kg•m/s of momentum. What is it’s velocity?

liraira [26]

Answer:

v = 27.5 m/s

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p = m × v

6,875 = 250 × v

250v = 6,875

v = 6,875/250

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2 years ago

Explain how water changes state using physical changes.

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