When an object is cooled, the energy of its molecules decreases. Cooling reduces the thermal energy of the molecules, causing them to move more slowly.
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Heat is a type of energy that can be converted into work. Count Rumford (Benjamin Thompson) first gave direct evidence of this through his experiments on the boring of cannons, which demonstrated the mechanical equivalent of heat.
The scientist who first melted two pieces of ice by rubbing them together was Sir Humphry Davy. He demonstrated that friction could generate heat, which melted the ice.
When some water is churned continuously, its temperature increases. In this process, mechanical energy is converted into thermal energy due to the work done on the water, which raises its temperature.
The temperature of boiling water in a steam engine can become high because there is high pressure inside the boiler. This elevated pressure increases the boiling point of water, allowing it to reach higher temperatures before vaporizing into steam.
The water in the hand pump is hot in winter because water comes out from inside and absorbs heat from the surroundings. As the water travels through pipes underground, it absorbs heat from the relatively warmer Earth. Consequently, when pumped ...
Insulin, produced by the pancreas, regulates blood sugar levels and is often referred to as the pacemaker of the endocrine system due to its central role in controlling metabolism and energy utilization.
Myxoedema occurs due to dysfunction of the Thyroid gland. This condition is characterized by severe hypothyroidism, leading to swelling of the skin, hair loss, fatigue, and other systemic symptoms due to decreased thyroid hormone production.
Enlargement of the Thyroid gland occurs in Goitre, a disease caused by iodine deficiency. Lack of sufficient iodine disrupts thyroid hormone synthesis, leading to thyroid gland enlargement in an attempt to compensate for decreased hormone production.
Excessive hormone secretion of the pituitary gland can lead to [A] Excessive growth in height. This condition, known as gigantism when it occurs in childhood or acromegaly in adulthood, results from overproduction of growth hormone, causing abnormal skeletal growth and ...