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RUDIKE [14]
3 years ago
14

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Physics
1 answer:
notka56 [123]3 years ago
7 0
It is called a pure sound
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a sydiver jumps out of a plane. She fall dowward at a very fast speed. Which force is acting upon it?
UNO [17]

Answer:

There will be two forces acting on her: Gravitational force and Air resisitence

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Write an essay about the Electromagnetic spectrum and its many uses in real life practices. Answer these questions in the essay:
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3 years ago
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True or False: An example of an Isometric movement is a plank. please help 2 mins left!<br> PE
Anon25 [30]

Answer:

Yes

Explanation:

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3 years ago
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How far (in meters) above the earth's surface will the acceleration of gravity be 21.0 % of what it is on the surface?
weeeeeb [17]

Answer:

7532m

Explanation:

Gravity on the surface of the earth with radius R is given by:

F_1=\frac{Gm_{earth}m_{object}}{R^2_{earth}}

Gravity a distance r above the surface:

F_2=\frac{Gm_{earth}m_{object}}{(R+r)^2}

How big is r if:

F_2=0.21\times F_1

You get the following equation:

R^2=0.21(R+r)^2=0.21R^2+0.41Rr+0.21r^2

Solve for r:

r^2+2Rr-\frac{79}{21} R^2=0

r=-R+\sqrt{R^2+\frac{79}{21}R^2}=-R+\sqrt{\frac{100}{21}R^2}=(\frac{10}{\sqrt{21}}-1)R

8 0
3 years ago
What is an important trend you would notice about the elements as you move from left to right?
andrezito [222]

Answer:

From left to right across a period of elements, electronegativity increases. If the valence shell of an atom is less than half full, it requires less energy to lose an electron than to gain one.

Explanation:

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3 years ago
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