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AlekseyPX
3 years ago
6

How many items are present in the compound (NH4)2Cr2O7

Physics
1 answer:
SVEN [57.7K]3 years ago
5 0
In 2Cr2O7 there’s 2 items; Cr and O
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Many physical quantities are connected by inverse square laws, that is, by power functions of the form f(x)=kx^(-2). In particul
goldenfox [79]

Answer:

  • 4 times

Explanation:

Since the equation for the illumination of an object, i.e. the brightness of the light, is <em>inversely proportional to the square of the distance from the light source</em>, the form of the function is:

  • f(x) = k.x⁻²

Where x is the distance between the object and the light force, k is the constant of proportionality, and f(x) is the brightness.

Then, if you move halfway to the lamp the new distance is x/2 and the new brightness (call if F) is :

F=k(x/2)^{-2}=\frac{k}{(x/2)^2}= \frac{k}{x^2}. 4=f(x).4

Then, you have found that the light is 4 times as bright as it originally was.

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3 years ago
Before digital filmmaking, what tool was used to control the speed of movement on the screen after filming?
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Answer:

The appropriate response is "Optical printer ".

Explanation:

  • A photographic printer used mostly for optical aberrations, comprised simply of either a camera that captures the frame to expand, minimize, deform, respectively. through magnifying lenses.
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4 years ago
If you have two wires made out of the same material and the same thickness, one is 3-inches long and one is 6-inches long, which
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3 inch long wire

Explanation:

it is shorter

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_____ heat provides energy for thunderstorms and hurricanes. Polar Geothermal Nuclear Latent
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The correct answer is Latent. Latent heat provides energy for thunderstorms and hurricanes. Hurricanes are a low pressure that is formed in warm oceans and the source of this energy is water vapor. Water vapor serves to be the food to the hurricanes because they release the latent heat of condensation.
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