How the dishwasher works?

A dishwasher is equivalent to a robot that cleans and rinses dirty dishes.
It has a timer that operates like a small computer, regulating length of each cycle. There are sensors to detect water and air temperature, water level and some that can detect the dirtiness of the water coming off from the dishes.

Compartments of a dishwasher:
Control mechanism
Located inside the door behind the control panel. Most are using simple electro-mechanical system, which works like timer. Modern units have computerized control system, door latch or child safety locks.


Intake valve
The main supply of water to the dishwasher. When the valve opens, water pressure drives the water into the unit without pumping in water.

Pump
An electric motor ontrols the pump is situated at the bottom of the basin, in the center of the dishwasher. During pump cycle, water forces up into the spray arms from the pump's pressure. During the drain cycle, the pump automatically directs water into the drain hose.

The magic of a dishwashers:
•Fills itself water and heats, it at appropriate temperature
•Opens detergent dispenser automatically
•Shoots water through jets to get the dishes clean
•Drains the dirty water and rinses dishes
•Optional to dry the dishes off

Inside Dishwasher
Watertight and not filled with water.
Small basin at the bottom fills up.
Maximum heating goes up to 130 to 140 degrees Fahrenheit.
A pump will propels water to the water jets spraying against the dirty dishes. Drying the dishes is an optional cycle.

Needless to say, common problems occur from dishwashers includes getting he dishes squeaky clean, stuck-on food or detergent, low water pressures due performance of water intake valve or minerals in the waters that will clog up the jets.

But to think of it, we don't have to stand all night cleaning the party plates from last night's barbeque. Isn't that nice?

This is four Guideline to using a Dishwasher:
Don't use regular dish soap. Use only those designed for dishwasher.

Don't overload the dishwasher. Space needed for water jets to spray onto the dishes.

Don't mix steel and silver items to avoid corrosion.

Don't put wood, cast iron; fine china, crystal or hand-painted dishes into the dishwasher.

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How Ice Cream Works

The standard ice cream according to the US standards must consist of least 10 % milk fat, and a minimum of six % non-fat milk solids. A gallon of ice cream has to weigh at least 4.5 pounds.

Milk fats (referred as butter fat) are used in ice cream from the range of minimum 10 % to a maximum of 16 %.

Most premium ice creams uses 14 % milk fat. The higher the percentage the creamier and tastier it is. Anything higher than 16 % will be costly and high in calories, which is hazardous for consumers and bad market for suppliers.



Frozen desserts, such as sorbets, low-fat ice cream, and frozen yogurt, are not considered ice cream. Frozen custard is ice cream as it contains a minimum of 1.4 % egg yolk.

Scientific explanation
Ice cream is a colloid, a type of emulsion, combination between two substances that don't normally mix together. Molecules of fat are suspended in a water-sugar-ice structure along with air bubbles in ice cream forming a presence of air into foam.

In addition, ice cream also contains stabilizers and emulsifiers. Gelatin was originally used, as a stabilizer, but modern manufacturers tend to use other chemical compounds.

It is easy to make ice cream to your taste buds. But watch that waistline...

Chocolate Almond Ice Cream Recipe
Ingredients :
2 cups heavy cream
2 cups half and half
3/4 cup sugar
1/8 tsp. Salt
2 tsps. vanilla extract
1/2 cup miniature chocolate chips
1/2 cup blanched almonds, toasted and chopped

Instructions :
Combine all ingredients, except chocolate chips and almonds, in a bowl. Mix thoroughly until sugar is dissolved. Stir in remaining ingredients and chill in refrigerator. Freeze in an ice cream maker 20-30 minutes until frozen.

source: www.howstuffworks.com

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How Fire Extinguishers Works

Control the fire while it is small. As it gets bigger, it will turn to foe. Fire extinguishers are au essential thing to own regard less of location.

Getting to know Fire
Fire resulted from a chemical combustion reaction, typically a reaction between oxygen and some sort of fuel with certain heated temperature (wood or gasoline for example).

Three essential elements involved in a fire process:
•Extreme heat
•Oxygen (or similar gas)
•Fuel

One of the elements will have to be removed to put out the fire. That is where the potential fire extinguisher comes in.



•To remove heat:
Dump water on the fire. This cools the fuel to below the ignition point, interrupting the combustion cycle.

•To remove oxygen:
Smother the fire so it is not exposed to air. Example: Smother a small fire by covering it with a heavy blanket. Another way would be dumping nonflammable material, such as sand or baking soda on top.

•To removing fuel:
The fuel can only be removed once the fire has burned all of it up.

Fire extinguishers are sturdy metal cylinders filled with water or a smothering material. Once a lever at the top of the cylinder is pressed, the material is expelled by high pressure, similar to an aerosol can. At the top of the cylinder, there is a smaller cylinder filled with compressed gas. To use the extinguisher, simply pull out the safety pin and depress the operating lever. The valve inside will be opened and releases gas or contents of the cylinder.

Types of Extinguishers
Water extinguisher: Put out things like burning wood, paper or cardboard, but it does not work well on electrical fires or fires involving inflammable liquids. Any water contracted with electrical fire will be harmful to human and make the fire worse.

Pure carbon dioxide extinguisher: Carbon dioxide gas is heavier than oxygen, so it displaces the oxygen surrounding the burning fuel. Commonly found in restaurants, as it doesn't contaminate the cooking equipment or food.

Dry chemical foam or powder extinguisher: Typically made of sodium bicarbonate (normal baking soda), potassium bicarbonate (nearly identical to baking soda), or monoammonium phosphate. Starts to decompose at only 158 degrees Fahrenheit (70 degrees Celsius), and only releases carbon dioxide once it reaches the point. The carbon dioxide works to smother fire.

Of course fire extinguishers contain only a fairly small amount of fire-suppressant material, which it will be used up in a matter of seconds. For larger fire, a fire engine and professionals are needed. Do make sure that safety measures are taken before things get out of control.

source: www.howstuffworks.com

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