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KATRIN_1 [288]
3 years ago
9

A paper weight is dropped from the roof of a block of multi story flats. Each storey being 3 metre high. It passes the ceiling o

f the 20th storeys at 30m/sec. If g = 10.0m/sec^2, How many storeys does the flat have.
Physics
1 answer:
docker41 [41]3 years ago
6 0
Use equations of motion to get the correct answer!
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The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a
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The intensity on a screen 20 ft from the light will be 0.125-foot candles.

<h3>What is the distance?</h3>

Distance is a numerical representation of the length between two objects or locations.

The intensity I of light varies inversely as the square of the distance D from the source;

I∝(1/D²)

The ratio of the intensity of the two cases;

\rm \frac{I_1}{I_2} =(\frac{D_2}{D_1} )^2\\\\ \rm \frac{2}{I_2} =(\frac{20}{5} )^2\\\\ \frac{2}{I_2} =4^2 \\\\ I_2= \frac{2}{16} \\\\  I_2= 0.125 \ foot-candles

Hence, the intensity on a screen 20 ft from the light will be 0.125 foot-candles

To learn more about the distance refer to the link;

brainly.com/question/26711747

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2 years ago
What is a satellite
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an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.

Explanation:

Look it up on google

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3 years ago
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Which statement is NOT evidence of the plate tectonic theory?<br> PLS SOMEONE HELP QUICK
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Answer:

what are the statements?

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Three cannons are located at the top of a cliff above a level plain. Cannon A is aimed at an angle of 25° above the horizontal a
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Using conservation of energy

The final kinetic energy of canon depends on initial kinetic energy and potential energy.

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The modern atomic theory has given by "John Dalton and framed postulates".

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The fundamental role of atoms in chemistry is established by the modern theory of atoms mentioned in 1808 for the first time by an English scientist named John Dalton. This consists of three sections such as all matter is composed of atoms, atoms of the same element are the same while atoms of different elements are different, atoms combine to form compounds in full-number ratios.

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