Advertisements
Advertisements
Question
A piece of brass of volume 30 cm3 has a mass of 252 g. Find the density of brass in (i) g cm-3, (ii) kg m-3.
Advertisements
Solution
Given , Mass M = 252 g
Volume V = 30 `"cm" ^3`
(i) Density d = `"M"/"V"` = `252/(30 "cm"^3)`
= 8.4 g `"cm" ^-3`
(ii) since , M = 252 g = 0.252 kg
v = 30 `"cm"^3` = 30 × `10 ^-6 "m"^3`
Density d = `(0.252 "kg" )/(30 × 10^-6 "m"^3)`
= `(0.252 kg )/(30× 1/1000000 m^3)`
=`(0.252 × 1000000 "kg" )/ (30 "m"^3)`
= `25200/ 3 "kg m"^-3`
= 8400 kg `"m"^-3`
APPEARS IN
RELATED QUESTIONS
Explain the meaning of the term speed.
A solid silver piece is immersed in water contained in a measuring cylinder. The level of water rises from 50 ml to 62 ml. Find the volume of silver piece.
Define one metre, the S.I. unit of length. State it's one multiple and one submultiple.
State if the following statement is true or false:
The symbol used for a unit is always written in capital letters.
Answer the following in short.
What do you understand by the term measurement?
Answer the following in short.
Mention any two advantages of the metric system over traditional units.
Explain giving examples.
Vector quantity
Your friend was absent from school yesterday. You are enquiring about his absence. He told that he had a fever and it was measured to be 100oC. Is it possible to have a 100oC fever? If he is wrong, try to make him understand.
What do you mean by ‘unit’?
Match List I with List II.
| List I | List II | ||
| A. | Torque | I. | Nms-1 |
| B. | Stress | II. | J kg-1 |
|
C. |
Latent Heat | III. | Nm |
|
D. |
Power | IV | Nm-2 |
Choose the correct answer from the options given below:
