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We can begin studying thermal properties of matter with definitions of temperature and heat. Temperature is a relative measure, or indication of hotness or coldness. A hot utensil is said to have a high temperature, and ice cube to have a low temperature.
In physics, we need to define the notions of heat, temperature, work, etc. more carefully. Historically, it took a long time to arrive at the proper concept of ‘heat’. Before the modern picture, heat was regarded as a fine invisible fluid filling in the pores of a substance.
Textbooks PDF (I-XII) ... Physics Part-II: Rationalised Content: Prelims: Guide for using QR Code: Chapter 1: Chapter 2 Chapter 3 ... NCERT, Sri Aurobindo Marg, New Delhi-110016. dceta.ncert@nic.in +91 8800440559. Important Helpline Numbers. Women Helpline Number : 7827170170.
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