Advertisements
Advertisements
प्रश्न
At 15∘C the height of Eifel tower is 324 m. If it is made of iron, what will be the increase in length in cm, at 30∘C?
Advertisements
उत्तर
Height of Eifel tower = 324 m = 32400 cm at 15∘C
Temperature coefficient of linear expansion of iron = 11.5 × 10-6°C-1
Change in temperature = 30∘C − 15 ∘C = 15∘C
Change in length = Δl
Using formula for linear expansion of solids, we have
`(triangle l)/l = α_l triangle "T"`
`=> (triangle l)/32400 = 11.5 xx 10^(-6) xx 15`
`triangle l = 32400 xx 11.5 xx 10^(-6) xx 15`
= 5.6 cm
संबंधित प्रश्न
Whom should I Pair with?
| Group A | Group B | ||
| a. | Temperature of a healthy human body | i. | 296 K |
| b. | Boiling point of water | ii. | 98.6°F |
| c. | Room temperature | iii. | 0°C |
| d. | Freezing point of water | iv. | 212∘F |
Who is telling the truth?
Joule is the unit of heat.
Who is telling the truth?
Objects contract on heating.
Who is telling the truth?
Atoms of a solid are free.
Who is telling the truth?
The average kinetic energy of atoms in a hot object is less than the average kinetic energy of atoms in a cold object.
The apparatus used to measure heat is called a ______.
The heat contained in a substance is the measures of the ______ kinetic energy of atoms in the substance.
Explain why rails have gaps at specific distances.
Analogy
Total Kinetic Energy of molecules: Heat :: Average Kinetic Energy : ______.
Make a list of electrical equipments at home which we get heat from.
