Refrigerators

because there are bacterials that lives in the meat ..the refrigerator slow the grouth of bacterials by the coldness! as u know bacterias need warmness to multiply so the counter is warmer than the fridge!! because there are bacterials that lives in the meat ..the refrigerator slow the grouth of bacterials by the coldness! as u know bacterias need warmness to multiply so the counter is warmer than the fridge!!

Yes, the colligative property you are referring to is osmotic pressure. Osmotic pressure is the pressure required to prevent the flow of solvent across a semipermeable membrane. It is directly proportional to the concentration of solute particles in the solution.

Fridges are typically made from stainless steel, which is a combination of steel, chromium, and nickel. This material is chosen for its durability, resistance to corrosion, and sleek appearance. Some older models may also use other metals such as aluminum or copper.

Keeping reagents on ice helps to slow down chemical reactions and enzyme activities that may lead to degradation or unwanted changes in the reagent before they are used in the experiment. This helps to ensure the reagents remain stable and maintain their integrity, which is important for obtaining reliable and reproducible results in experiments.

On average, a small to medium-sized fridge typically uses about 1-2 kilowatt-hours (kWh) of electricity per day, so that would be roughly 0.04-0.08 kWh in an hour. However, the exact usage can vary based on the size, age, and efficiency of the fridge.

There could be several reasons for this issue such as a malfunctioning compressor, evaporator fan not working, or a problem with the thermostat. It's best to unplug the refrigerator, check for any visible issues, and then consult a professional repair service if needed.

The fridge is cold inside because the cooling system inside the fridge absorbs heat from the interior, keeping it at a lower temperature. The warmth outside the fridge is a byproduct of the cooling process, as the heat removed from inside the fridge is released outside. This heat release helps maintain the temperature difference needed for the fridge to stay cold inside.

A fridge uses electrical energy to operate the compressor, fan, and other components that cool the interior and regulate the temperature.

If a refrigerator gets flipped upside down, the oil from the compressor can flow into the refrigeration lines and block them, causing potential damage to the compressor. It is recommended to wait for 24 hours before turning on the refrigerator after it has been flipped back upright to allow the oil to drain back to the compressor.

Natural gas typically releases the most heat energy per unit volume compared to other fuels like coal, oil, and biomass. This is because natural gas has a higher energy content per unit weight and burns more cleanly, making it an efficient fuel for heating and power generation.

The actual role of the cooling coil behind (or underneath in some cases as well as inside the side walls on some models) is to dissipate the heat collected from INSIDE the refrigerator as a result of the cooling cycle. If you would like more information on the subject, please follow the related links below to "How Stuff Works" The motor typically dissipates heat through a separate heat sink to prevent from excess heat being reintroduced into the refrigerator.

Optimum temperature for a refrigerator is between 45 and 48 degrees Fahrenheit. In Celsius, freezing is 0 (zero). Your calculator will do the rest.

That varies widely among different refrigerators. But you should ask your question slightly differently. Kilowatts would refer to how much power the fridge is using at a single instance. I you are concerned with power usage over a year, you need to multiply by time, ie kilowatt-hours (commonly seen as kWh). This is the unit the power company charges you by. Look for a sticker on your fridge, all modern ones will have one that tells you the yearly kWh consumption.

Air conditioning units are designed to cool enclosed spaces, typically using a fan to move hot air out and cool air in. Refrigerators, on the other hand, are appliances designed to cool and preserve perishable items for consumption, utilizing a closed system that circulates refrigerant to maintain a low temperature. Both use the same principles of heat transfer, but are optimized for different purposes.

The refrigerator was invented by Oliver Evans in 1805. He designed the first refrigeration machine that used vapor instead of liquid to cool.

No. Some metals are non-magnetic (technically, "diamagnetic," they're actually very weakly repelled by magnets). Gold, silver, and copper are all diamagnetic. Also, the alloys used in United States coins and certain types of stainless steel are either non-magnetic or only weakly attracted by magnets. Scientists working on or near very strong magnets often use special tools made of non-magnetic alloys to avoid mishaps.

A refrigerator or freezer works by removing heat from the interior compartment using a refrigeration cycle. This cycle involves a compressor, condenser, evaporator, and expansion valve. The refrigerant absorbs heat inside the compartment, then releases it outside, keeping the interior cool.

The Refrigerator evaporator coil has many forces working upon it from a wide swing of temperature and pressure and vibrations that is caused. Then there is the ice that builds up on the coil between defrost cycles that produces some of the forces that are on the coil. To that add electrolyses of the different metal that are uses in the coil and the corrosive chemical bath that comes from the area and products being refrigerated. The refrigerator evaporator coil have a lot of silver soldered 90 degree union fitting that the forces work on. Than there is the design of the standard refrigerator evaporator coil. The coil sets in the drain pan and drips condensate into the drain pan. A long with the condensate comes some of the dirt and lent that collects on the evaporator fins and if not maintained it will plug the fins and than plug the drain pan. And fill the coil with condensate then more ice. When you really look at the refrigeration evaporation coil you wonder why they don't leak more. I am not even going to talk about the guys that defrost refrigeration evaporator coils with a ice picks.

The Energy Transformations in a Fridge are Electrical Energy, Mechanical Energy, Thermal Energy.

I had to do this for science at high school in year 7 and this is the answer!


hope it helps

Water evaporates slowly in a fridge because the low temperature in the fridge reduces the kinetic energy of water molecules, making them less likely to escape into the air as vapor. Additionally, the relative humidity is higher in a fridge, which means there is already more moisture in the air, slowing down the rate of evaporation.

Start by taking the number in Celsius and multiply it by 9. Then divide that number by 5, and then add 32. This is how you convert Celsius to Fahrenheit or use the equation F = (9/5)C + 32
In this case, the answer is about 37.4 degrees Fahrenheit.

Tin is a non-toxic and corrosion-resistant metal that forms a protective barrier on the can's surface, preventing contact between the fruit and the can itself. This helps to maintain the quality of the fruit and prevents contamination or spoilage.

liquid nitrogen