By which mechanism heat is lost by hot bodies?
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When one mole of zinc combines with sulphuric acid 445 kJ of heat is liberated and when a mole of copper is liberated from blue vitriol 235 kj of heat
Correct Answer - 1.09 V
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Fill in the blanks Substance through which heat travels easily and quickly are said to be _________of heat.
Correct Answer - good conductors
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In which incident 93 innocents lost their lives?
A) Kumbakonam school fire accident
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State various units of heat and relate them to SI unit of heat.
1. CGS unit of heat: erg and it is related to SI unit as, 1 J = 107 erg 2. Thermodynamic unit of heat: calorie (cal) and it is related as 1 cal...
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Heat energy will be transferred, when two bodies are placed in thermal contact which are at different temperatures
B) from a body at higher temperature to lower temperature
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Elow of heat energy between two bodies or systems requires …………………….
C) temperature difference
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Net heat lost by the hot bodies = Net heat gained by the cold bodies
C) Principle of method of mixtures
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Describe the mechanism of heat transfer by convection in liquids and gases.
1. Consider liquid being heated in a vessel from below. 2. The liquid at the bottom of the vessel is heated first and consequently its density decreases i.e., liquid molecules at...
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The mechanism which controls the action of hormones is ……………
(A) Feedback mechanism
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Dhruvi met with an accident and has temporarily lost her ability to perceive external auditory stimuli. Which tissue must be affected?
Sensory epithelium is composed of a modified form of columnar cells and elongated neurosensory cells. Sensory hairs are present at the free end of these cells. Function: It perceives external as...
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