Question

12. A copper wire of length 20 cm has diameter 0.240 cm
What is the volume of the wire 7 If the density of the wire
is 8.2 g cm. find the mass of the wire
10.288 cm': 2.36g​

Answer 1

Answer:

0.904 cubic centimetres and 7.41 grams

Explanation:

Volume of copper wire = Area × Height (length of wire) or π × (radius)^2 × height

Diameter = 0.24 cm , radius = 0.24/2 = 0.12cm

Volume = 3.14 × 0.12cm × 0.12cm × 20cm

= 0.904cm^3

Density of wire = 8.2g cm^3

Density = Mass/Volume

8.2g/cm^3 = Mass/0.904cm^3

Mass = 0.904cm^3 × 8.2g/cm

= 7.41 grams.

Answer 2

Explanation:

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