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What scientific principle is at work when a pan is covered while cooking?
The scientific principle at work is Convection. When the pot is covered the heat is retained, the soup begins to cook faster.
What happens to thermal energy during condensation?
Think what happens if you place a glass lid over a pan of boiling water. You will see liquid form on the underside of the lid. Instead of escaping from the closed pan, the water vapor formed from boiling hits the cooler lid and forms liquid drops through condensation. Energy is transferred as heat from gas particles to the lid. The gas particles no longer have enough energy to overcome the attractive forces between them, so they go into the liquid state.
Why dows running hot water over a tight lid make a jar easier to open?
The heat causes a slight expansion of the lid, which relieves pressure of the lid against the jar.
Why does a cup of tea lose heat faster than without a lid?
cus its uncoverd your letting all the heat out
How could you use thermal expansion to help get a tight lid off a jam jar?
Heat the metal lid (but try not to heat the glass jar as much) and the thermal expansion will make the lit easier to screw off (I do this often by running the lid under hot tap water).
What happens to a liquid to a gas?
Think what happens if you place a glass lid over a pan of boiling water. You will see liquid form on the underside of the lid. Instead of escaping from the closed pan, the water vapor formed from boiling hits the cooler lid and forms liquid drops through condensation. Energy is transferred as heat from gas particles to the lid. The gas particles no longer have enough energy to overcome the attractive forces between them, so they go into the liquid state.
Why must the lid be sealed when lavender flowers are heated in a container?
To stop water vapour escaping
Why puttung lid on saucepan makes the water in it comes to boil come to boil more quickly?
Putting a lid on the pan makes the water boil quicker because the heat is trapped, less is escaping, so the water's temperature has more time to increase, so it gets more hot and boils faster.
What is happening when boiling vegetables on a stove and the lid pops up?
air is escaping. boiling veg in water causes air bubbles to be formed, which pressurize the lid up. Jimmy Neutron
How can you prevent nail polish from drying out?
you close the lid!
Do you simmer spaghetti sauce with lid on or off?
This may depend on the recipe. Simmering with a lid on uses less heat than with the lid off. Leaving the lid on means that evaporation will be lower - but sometimes the purpose of simmering is to reduce the amount of fluid.... so this may be necessary.
How thermoflask is built?
Hi there the thermos flask use inslators inside its design such as cork and plastics . The inside where youre fluid goes is usually covered in a reflective material to prevent heat absorption.The lid also traps heat escapeing from the top and stops spill and leaks . theres is also a space in the flask wall which has a vacuum in it to prevent further heat loss.
What is Pencil lid a form of?
A pencil lid is a form of lid, but specifically designed for pencils to stop the tip of the pensil breaking off and making your pencil cases dirty.
Which boils first open lid or close lid?
Closed lid. It allows for the heat to build up quicker therefor making it boil faster.
What scientific principle is at work when a pan is covered while cooking?
The scientific principle at work is Convection. When the pot is covered the heat is retained, the soup begins to cook faster.
You finished cooking and put the pot aside to cool with the lid on. The lid is now stuck to the pot. How do you remove the lid?
Heat the pot back up, everything will expand again and the lid will come off.
What happen to the lid when you heat a sealed can?
The air in the can could either pop the lid off or destroy the can as it got hot and expanded.
