An iron bar has mass 390 g and volume 50 cm³.Find the density of iron in (a) gcm–³ (b) kgm–³
Answers
Answered by
10
Answer:
- Density of Iron is, 7.8 g cm⁻³ and 7800 kg m⁻³.
Explanation:
Given,
- Mass of Iron bar = 390 g
- Volume of Iron bar = 50 cm³
To find,
- Density of Iron in (a) g cm⁻³ and (b) kg m⁻³
Formula required,
- Formula to calculate density
Density = Mass / Volume
Solution,
Using formula
→ Density = mass / volume
→ Density = ( 390 g ) / ( 50 cm³ )
→ Density = (390/50) g cm⁻³
→ Density = 7.8 g cm⁻³
Now,
We have density in g cm³
So, converting it to kg m⁻³
→ Density = 7.8 g cm⁻³
( since, 1 g = 0.001 kg and 1 cm = 0.01 m )
→ Density = 7.8 (0.001 kg) ( 0.01 m )⁻³
→ Density = 7.8 × 0.001 × 1 / ( 0.000001 ) kg m⁻³
→ Density = 7.8 × 1000000 / 1000 kg m⁻³
→ Density = 7800 kg m⁻³
Therefore,
- Density of Iron bar is 7.8 g cm⁻³ and 7800 kg m³.
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Answer:
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