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Why is it imp to heat the lip of the test tube and bottles just after opening and just before closing them?
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Why does the temperature gauge fluctuate in cold weather and heat comes on and off?
Check coolant level Could be thermostat opening and closing due to engine coolant temperature flutuation
Glass as a building material?
As we know that the glass attracts heat and prohibits heat from escaping from indoors and makes the interior hot . so glass is not a good building material.
When was the first hot water bottle made?
Hot water bottles are made from polyvinyl chloride(PVC) and rubber. Hot water bottles are manufactured such that they don't leak ,have long durability and provide good heat.
Precautions before distillation of an organic liquid?
Obtain approval from your laboratory instructor before starting a distillation. Make certain the apparatus has an opening...Use a fresh boiling chip each time a liquid is boiled to avoid bumping... Do not heat any distillation pot to dryness. Do not heat a closed apparatus because abrupt release of the increased pressure may propel reagents or pieces of glass... Also glassware that is superheated could crack. Before heating a flask, clamp the neck of the flask to support it in an elevated position to allow withdrawal of the heat source and rapid cooling... page 3-4.
Why does thermos bottles advertised as good for 24 hours while others are claimed to be able to keep liquids hot or cold for 48 hours?
Some thermos bottles advertised as good for 24 hours because they are better insulated. They also permit expansion due to heat.
Is washing bottles in a dishwasher an effective way to sterilize baby bottles?
Using the dishwasher with a high heat dry will work just find to sterilize bottles. As long as you boil them before the first use, you will be fine.
What is the meaning ofthermostat?
A self-acting apparatus for regulating temperature by the unequal expansion of different metals, liquids, or gases by heat, as in opening or closing the damper of a stove, or the like, as the heat becomes greater or less than is desired.
Why does the temperature gauge fluctuate in cold weather and heat comes on and off?
Check coolant level Could be thermostat opening and closing due to engine coolant temperature flutuation
What can cause the heat to quit working in a 1992 Buick Roadmaster?
Possibly a bad heater core. Could be simple stuff though. Have you checked your coolant level? Sometimes those "doors" in the dashboard for the heat and a/c are not opening and closing properly.
What refers heat?
The root word therm refers to heat, as it does in thermos bottles and thermometers.
How much clorine for 4000 gallon pool?
Probably 6 gallons when you are opening in the spring. Zero if you are closing it up for the winter. In the heat of the summer, enough to keep your chlorine level at 1-3PPM.
Ears won't pop?
It can be a very uncomfortable feeling when your ears will not pop. The pressure might be relieved by chewing gum, opening and closing the mouth in an exaggerated manner or by putting heat next to the ears for a few minutes.
Why is it dangerous to heat the canned food before opening up the can?
The can can explode; they're not designed to withstand the pressure of steam forming inside.
What refers to heat in atoms and chemistry?
The root word therm refers to heat, as it does in thermos bottles and thermometers.
How can you tell if the thermostat is going out?
Vehicle takes an excessive time to attain normal operating temperature Heat not HOT with coolant full - thermostat not closing properly Vehicle heats up too soon - No heat with coolant full Coolant boils out of reservoir or top of radiator - thermostat not opening
Why does closing windows reduce heat transfer?
because it doesnt allow heat to get inside or outside, depending on the season
How do you make a thermos bottle?
Commercial Thermoses basically use two bottles (a smaller one secured inside a larger one) and attach them at the opening. They then pump the air out of the space between the bottles, creating a vacuum. Because they require matter to happen, this essentially eliminates the possibility of conduction and convection in the space between the bottles. With the primary methods of heat transference eliminated (except at the opening) only radiation can cause change of temperature. If you're looking to make one yourself, I'm guessing you don't have the equipment to pump a vacuum. Air, foam, water, and human skin are all excellent insulators that you could use to fill the space between the bottles.
