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Jobisdone [24]
3 years ago
8

A piece of metal is 4 cm by 10 cmby 2 cm. Find its mass if it has adensity of 2 g/cm'.​

Physics
1 answer:
harina [27]3 years ago
3 0

Answer:

m=ρV

V=LxWxD

V=4x10x2=80

m=2*80=160 grams

Explanation:

Mass is equal to density multiply by volume of object. Volume of rectangle pice can be calculated by multiplying all sides.

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A spherical balloon has a radius of 6.95 m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of a
Aleks [24]

volume of balloon

= 4/3 T R3

= 4/3 x 3.14 x 6.953

= 1405.47 m3

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= 1813.05 x 9.8 N

weight of helium gas

= volume of balloon x density of helium x

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= 1181.58 x 9.8 N

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3 0
3 years ago
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5 0
3 years ago
A 1.5m wire carries a 3 A current when a potential difference of 86 V is applied. What is the resistance of the wire?
Iteru [2.4K]
We know, R = V / I
Here, V = 86 V
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Substitute their values, 
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In short, Your Answer would be 28.67 Ohms

Hope this helps!
8 0
3 years ago
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