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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ९

Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal. Reason (R): To convert a temperature on the Celsius scale we have to add 273 to - Science

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प्रश्न

Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.

Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.

विकल्प

  • Both A and R are true but R is not the correct reason.

  • Both A and R are true and R is the correct reason.

  • A is true but R is false.

  • A is false but R is true.

MCQ

उत्तर

Both A and R are true and R is the correct reason.

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अध्याय 1: Measurement - Exercise [पृष्ठ १२]

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सामाचीर कलवी Science [English] Class 9 TN Board
अध्याय 1 Measurement
Exercise | Q V. 2. | पृष्ठ १२

संबंधित प्रश्न

What is the Kelvin scale of temperature? 


Name two substances which expand on heating. 


State the volume changes that you will observe when a given mass of water is heated from 0°C to 10°C. Sketch a temperature-volume graph to show the behaviour. 


A given mass of water is cooled from 10°C to 0°C. State the volume changes you will observe. Represent these changes on a temperature-volume graph. 


Explain the following

Water pipes in colder countries often burst in winter.


Distinguish between heat and temperature.


What causes a change in the temperature of a body?


Is conduction possible in gases?


Name a substance which is an insulator of heat.


State one use of each of the following type of thermometer: 
Clinical thermometer


Explain the three modes of transfer of heat.


Give a scientific reason for the following:
In winter the human body covered with a blanket keeps warm.


Give a scientific reason for the following:
On a hot sunny day, it is advisable to wear light coloured clothes.


The hot metal ball is suspended from a string in a metal box as shown in the following figure

(i) What are the ways in which the ball loses heat

(ii) Which side of the box will be the hottest and which the least hot after some time? Explain.


The following figure shows a copper washer. Explain, giving reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated.

(a) Internal diameter
(b) Volume
(c) Mass
(d) Density
(e) External diameter


Name the metal which is most conducting.

Who am I?

I am useful for measuring the correct temperature.


The hotness of the object is determined by its ______.


State whether true or false. If false, correct the statement.

One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K.


Give reasons why –

an igloo is built as a winter shelter


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