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never [62]
3 years ago
6

If we increase the speed of rotation of wheel then the sound produced by cardboard touching the spokes of the wheel will become

Physics
1 answer:
Anarel [89]3 years ago
5 0

it will become shrill

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A copper rod 81 cm long is used to poke a fire. the hot end of the rod is maintained at 105° c and the cool end has a constant t
Ugo [173]
The temperature inside the copper rod varies linearly with the distance from the hot end of the rod. This means that we can find the temperature at 23 cm (let's call it 'point A') from the cool end by solving a linear proportion.

The temperature difference between the two ends of the rod is
\Delta T = 105^{\circ}-21^{\circ} = 84^{\circ}
and this corresponds to a length of 81 cm. Therefore, we can write:
84^{\circ}:81~cm = x:23~cm
from which we find
x=23.8~^{\circ}
This is not the final answer actually; this is the temperature difference between the cool end and point A. So, the temperature at point A is
T_A = 21^{\circ}+x=44.8^{\circ}
7 0
3 years ago
Which of these statements partially defines law?
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Explanation:

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Which adaptation is likely to increase the chances of survival of an animal in a rainforest?
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Black-spotted skin coat as camouflage while stalking prey.
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3 years ago
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Oliver builds a circuit connecting a light bulb to a battery with wires, leaving a gap in one of the wires. He places several ob
Alexxandr [17]

Answer:

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

Explanation:

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Thus, the correction for this question is "D"

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

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