A(n)... is a material that takes in a wave when the wave hits it

Physics

1 answer:

pentagon [3]3 years ago

5 0

Absorber, it absorbs the light, like a black shirt is an absorber..

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What types of electromagnetic radiation that reaches earths surface

AlladinOne [14]

<span>The electromagnetic emissions from solar flares aren't much different from those produced by the rest of the sun, but do include somewhat higher levels of soft x-rays and low-energy gamma rays. These emissions are of course dwarfed by the normal output of the sun, and are of such low density by the time they reach Earth that they have no discernible effect on organic matter. </span>

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4 years ago

A package of aluminum foil contains 50. Ft2 of foil, which weighs approximately 7.0 oz . Aluminum has a density of 2.70 g/cm3. W

kumpel [21]

We know density = Mass / Volume

So Volume = Mass/Density

Volume = Area * Thickness

$Area = 50 ft^2 = 4.645152 m^2\\ \\Mass = 7 oz = 0.198447 kg\\ \\Density = 2.70 g/cm^3 = 2700 kg/m^3\\ \\Substituting \\ \\4.645152 *t = \frac{0.198447}{2700} \\ \\t = 1.58*10^{-5}m = 1.58*10^{-2}mm$

So the approximate thickness of the foil in millimeters = $1.58*10^{-2}mm$

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4 years ago

Which equation below would you use to determine the number of neutrons in a given nucleus when you are given the atomic number (

Mademuasel [1]

Answer:

A-Z

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A proton has an estimated weight of 1.

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4 years ago

Read 2 more answers

If the radius of an object in circular motion is doubled, what change will occur in the centripetal force?

cestrela7 [59]

Answer:

The centripetal force will be 1/2 as big as it was. (option c)

Explanation:

Recall that centripetal force ( $F_c$ ) is defined as: $F_c=m\,* \frac{v^2}{r}$ where "v" is the tangential velocity of the object in circular motion, "r" is the radius of rotation and "m" is the object's mass.

So if we start with such formula with a given mass, radius, and tangential velocity, and then we move to a situation where everything stays the same except for the radius which doubles, then the new centripetal force ( $F'_c$ ) will be given by: $F'_c=m\,* \frac{v^2}{2r}$