are these true or false and explain why: opening the door of a refrigerator will cool the kitchen..?

Question

shivering when you are cold actully warms you up....desert jackrabbits have large ears to keep them cool...

Answer 1

False: the fridge produces more heat than it can extract. If you open the door, the cold air will be compensated by warm air from the heat exchanger. This is a direct implication from the Second law of thermodynamics:
The total entropy of any isolated thermodynamic system tends to increase over time, approaching a maximum value.

True: Shivering produces heat, like any muscular exertion.

True: The large ears are used as radiators to evacuate heat from the blood. Notice the large ears are hevaily vascularized.

Answer 2

Hi. A refrigerator moves heat from inside to outside of the box. The net result is that an open door will actually HEAT the room because of motor heat and friction. Shivering warms your muscles. Any large surface can radiate heat (or absorb it). So I think it makes a difference whether the ears are in the Sun or not.

Answer 3

These are all true. If you open the fridge door, cold air from inside the fridge will get out and cool the kitchen off a little. However, hot air from the kitchen will also get into the fridge and spoil the food if you don't close the door.

Shivering makes your muscles work, and they generate heat when they work. You know how you get all hot and sweaty when you exercise, even if it's cold out? Shivering does the same thing. That's why we shiver when it's cold.

Jackrabbits' ears have a lot of surface area exposed to the air, and very little volume holding in the heat. So the air can carry heat away from the rabbits' ears quickly. They probably also have large veins in their ears, since blood vessels close to the skin lose heat quickly.

Answer 4

A fridge actually adds heat to the room it is in, due to the running of the motor and compressor and the heat extracted from the condenser coils.
Opening the door will not cool the kitchen. The extra heat into the fridge will make it work harder to maintain its set temperature.
Shivering is vibration of the muscles. The work done by the muscles is adding warmth to the body.
The large area of a jack-rabbit's ears do help to cool it but, they also magnify sounds and help to give warning of impending danger.

Answer 5

confident yet you would be maximum suitable to place it interior the doorway as i've got now and lower back executed to make a makeshift airconditioner. The refrigerator sends out greater warmth on the lower back then it cools on the interior. Airconditioners do precisely the comparable concern. in case you will possibly be able to desire to burn up this warmth to someplace the place you do no longer care if it gets warm (as an airconditioner does) then you certainly might desire to get your kitchen severe high quality and funky. As for the refrigerator interior the door trick in terms of physics this gadgets up a thermal gradient of chilly to warm from the interior to the lower back of your refrigerator. Your kitchen being on the front edge of the refrigerator gets cool while the the remainder of the domicile gets warm. Gaps interior the doorway will attempt to stability out the version however the refrigerator would be consistently pumping warmth to the lower back (the inefficency of the cycle including some warmth as properly) to maintain this temperature gradient.