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2 years ago

DON'T ANSWER IF YOU DON'T KNOW

Physics

2 answers:

sattari [20]2 years ago

8 0

The answer is Natural selection

Darina [25.2K]2 years ago

3 0

Answer:

the answer is Natural selection

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How do ions help your brain?

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Generally speaking, negative ions increase the flow of oxygen to the brain resulting in higher alertness, decreased drowsiness, and more mental energy.

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3 years ago

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What do you mean by 100W is written on an electric bulb?

Goryan [66]

Answer:

100 watt

Watt is a unit of power, for the light bulb its produces or consumes 100 watts of power

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3 years ago

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A force, F1, of magnitude 2.0 N and directed due east is exerted on an object. A second force exerted on the object is F2 = 2.0

IgorLugansk [536]

Answer:

Magnitude of the force is

$F_3 = 2.83$

direction of the force is given as

$\theta = 45 degree$ West of South

Explanation:

As we know that force is a vector quantity and in order to find the resultant of two or more forces we need to add them vectorialy

So here we have

$\vec F_1 + \vec F_2 + \vec F_3 = 0$

here we know that first force is of magnitude 2 N towards east

$\vec F_1 = 2 \hat i N$

second force is also of 2.0 N due North

$\vec F_2 = 2 \hat j$

now from above equation

$2\hat i + 2\hat j + \vec F_3 = 0$

$\vec F_3 = -2\hat i - 2\hat j$

so magnitude of the force is given as

$F_3 = \sqrt{2^2 + 2^2}$

$F_3 = 2.83$

direction of the force is given as

$\theta = tan^{-1}\frac{F_y}{F_x}$

$\theta = tan^{-1}\frac{-2}{-2}$

$\theta = 45 degree$ West of South

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3 years ago

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Someone answer pls !!!!

astra-53 [7]

Answer:

My best guess would be B due to the fact of friction in a simple machine

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3 years ago

A positive charge is moving across a room from south to

slega [8]

Answer:toward the ceiling

Explanation:

if you use the right hand rule it will point to the ceiling

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3 years ago