Answer:
water's high heat of vaporization
Explanation:
Water is a substance with a high heat of vaporization (2257 J/g). This means that 1 g of water evaporates, a large amount of heat is absorbed.
The mechanism of evaporation is used by the dog to cool their temperature, by panting. In fact, sweat accumulates on their tongue, then the molecules of water with higher kinetic energies evaporates, turning from liquid into gas, While doing so, they absorb a large amount of heat from the dog's body (thanks to the high heat of vaporization of water), allowing the animal to lower its temperature much efficiently.
Explanation:
The given data is as follows.
Electric field between plates without dielectric,
Electric field between the plates with dielectric, .
Permittivity of free space, =
Now, we will determine the charge density as follows.
=
=
Thus, we can conclude that the charge density on each surface of the dielectric is .
The correct choice is Buffers.
Buffers contains both acids and bases in equilibrium.when base is added to buffers, they adjust the pH value by releasing hydrogen ions.when acid is added to buffers, they adjust the pH value by consuming hydrogen ions. hence these substances resist any change in their pH value by releasing or absorbing hydrogen ions.This process keeps the pH value constant.