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son4ous [18]
3 years ago
11

a ball is thrown horizontally from the roof of a building 45m tall and lands 24m from the base what is the initial speed?

Physics
1 answer:
Irina-Kira [14]3 years ago
6 0
Its initial speed is 7.92 m/s

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10 turns of wire are closely wound around a pencil as shown in the figure. when measured using a scale as shown, the length of t
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Answer:

a. The thickness of the wire is 2.5 mm.

b. The wire is 0.25 cm thick.

Explanation:

Number of turns of the wire = 10

The length of total turns = 25 mm

a. The thickness of the wire can be determined by;

thickness of the wire = \frac{length of total turns}{number of turns}

                           = \frac{25}{10}

                           = 2.5 mm

Therefore, the wire is 2.5 mm thick.

b. To determine the thickness of the wire in centimetre;

10 mm = 1 cm

So that,

2.5 mm = x

x  = \frac{2.5}{10}

   = 0.25 cm

The wire is 0.25 cm thick.

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2 years ago
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