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.
Answer:
Explanation:
F = Force on the sled = 63 N
m = Mass of sled = 28.7 kg
= Coefficient of kinetic friction = 0.169
g = Acceleration due to gravity =
The force balance of the system is given by
The acceleration of the sled is .
Acceleration is any change in speed or direction of motion.
Speeding up, slowing down, or moving along a curve are all accelerations.
I think the correct answer from the choices listed above is the last option. When electrical energy is converted into thermal energy, the <span>total amount of thermal energy plus electrical energy doesn't change. This is base on the Law of Conservation of energy where energy cannot be created or destroyed. </span>