हिंदी

Lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C?

Advertisements
Advertisements

प्रश्न

On a faulty thermometer, a lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C?
टिप्पणी लिखिए
Advertisements

उत्तर

Lower fixed point = 10°C
Upper fixed point =130°C
Range of thermometer= 130°C - 10°C
= 120°C
No of divisions = 100
So least count = 120/100 = 1.2°C
On actual thermometer 40°C would have 40 divisions
So, on this thermometer, it would show
= 40 x LC = 48°C

shaalaa.com
Anomalous Expansion of Water
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 5: Heat and Energy - Exercise [पृष्ठ २३२]

APPEARS IN

फ्रैंक Physics Part 1 [English] Class 9 ICSE
अध्याय 5 Heat and Energy
Exercise | Q 83 | पृष्ठ २३२

संबंधित प्रश्न

Water is used as a cooling agent.


On what basis and how will you determine whether air is saturated with vapour or not?


Consider the situation of the previous problem. Assume that the temperature of the water at the bottom of the lake remains constant at 4°C as the ice forms on the surface (the heat required to maintain the temperature of the bottom layer may come from the bed of the lake). The depth of the lake is 1.0 m. Show that the thickness of the ice formed attains a steady state maximum value. Find this value. The thermal conductivity of water = 0.50 W m−1°C−1. Take other relevant data from the previous problem.


Explain the following

A hollow glass sphere which floats with its entire volume submerged in water at 4°C, sinks when water is heated above 4°C.


The following figure shows a metal cylinder, containing boiling water. One half side A is polished and another half, B is painted black. Two thin metal sheets X and Y are painted black and have one rubber stopper fixed with wax on each sheet. These sheets are equidistant from the boiling water (container A, B) as shown in the diagram. What would you expect to happen after a few minutes? Give a reason for your answer.


Describe an experiment to demonstrate thermal expansion in gases.

Name two substances which expand on heating.

Observe the given graph and answer the following questions:

  1. Name the process represented in the figure.
  2. At what temperature does this process take place?

In cold regions, in winter the pipes for water supply break.


Observe the following diagram and write the answers to the questions given below.

  1. Which process does the graph represent?
  2. What is the range of temperature responsible for the behaviour?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×