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3 years ago

9

Where in our daily lives do we encounter "background" radiation

1 answer:

Tcecarenko [31]3 years ago

8 0

Answer:

Explanation:Naturally occurring radioactive materials are present in its crust, the floors and walls of our homes, schools, or offices and in the food we eat and drink. There are radioactive gases in the air we breathe. Our own bodies - muscles, bones, and tissue - contain naturally occurring radioactive elements.

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If white light falls on a piece of white paper in a dark room, the paper appears white to the eye. This is because the paper ref

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It would appear Red because as stated above, the paper reflects all the colors of light that fall on it.

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A uniform disk of mass 21 kg, thickness 0.5 m, and radius 0.6 m is located at the origin, oriented with its axis along the y axi

goldenfox [79]

Answer:

$29.69 kgm^2/s$

Explanation:

So suppose the axis of rotation is perpendicular to the surface of the disk, then the moment of inertia can be calculated as the following:

$I = mr^2/2 = 21 * 0.6^2/2 = 3.78 kgm^2$

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In case the axis of rotation is parallel with the surface, the moment of inertia would have a formula of:

$I = m(3r^2 + h^2)/12 = 21*(3*0.6^2 + 0.5^2)/12 = 2.3275 kg m^2$

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What two factors determine gravitational potential energy?

Mashcka [7]

Mass & Height above the ground

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4 years ago

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The average it the constant speed.

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Salamanders do not undergo metamorphosis.<br><br> A. True<br> B. False

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B......................... <span>Yes they do!</span>

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