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3 years ago

A book that weighs 19 Newtons sits on a table. With what force

Physics

1 answer:

iVinArrow [24]3 years ago

5 0

Answer:

We know there's two forces acting on a book while it sits on a table:the force of gravity pulling it down, and the normal force of the table acting upward on the book. The book isn't accelerating while it sits there. That's because the weight of the book is being counteracted by the normal force of the table.

Explanation:

There are two forces acting upon the book. One force - the Earth's gravitational pull - exerts a downward force. The other force - the push of the table on the book (sometimes referred to as a normal force) - pushes upward on the book.

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Show us the pictures I don't see it

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3 years ago

A block of mass m is pushed up against a spring, compressing it a distance x, and the block is then released. The spring project

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Answer:

$x' = 10 x$

Explanation:

By energy conservation we know that spring energy is converted into kinetic energy of the block

so we will have

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so we will have

$v = \sqrt{\frac{k}{m}}(x)$

now we will have same thing for another mass 4m which moves out with speed 5v

so we have

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3 years ago

4. ________ have a positive charge

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3 years ago

Who would hire a forensic toxicologist

romanna [79]

Answer:

Scientists or doctors

Explanation:

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Read 2 more answers

An open system is a system where __________.

alexandr402 [8]

Answer:

Can enter or leave the system matter and energy. (The correct option is D)

Explanation:

Open system is defined as the system where exchange of matter, and energy occurs with its surrounding, presenting breaking down, and build up of its materials, and import, export of components.

Open system transfer the material into, and out of the system boundary, it contains an external interaction. A good example of open system is living things they actively connect with its environment, in results it shows changes in both the environment, and the living things.

So, the correct option is D.

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3 years ago