1.Describe how you would measure 125ml of hard margarine using water displacement?
2.Why are liquid measures frequently made of heat-proof glass such as Pryex?
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1. To measure 125ml of hard margarine using water displacement, you would need a measuring cylinder, a bowl of water, and the hard margarine you want to measure.
Here's how you can do it:
1. Fill the measuring cylinder with enough water so that it's about two-thirds full.
2. Carefully place the hard margarine into the water in the measuring cylinder. Make sure that the margarine is completely submerged and doesn't touch the sides of the cylinder.
3. Take note of the new water level in the measuring cylinder. This new level indicates the volume of the margarine.
4. Empty the water from the measuring cylinder and refill it to the original level before you started. This ensures you can accurately measure the displaced water volume.
5. Pour the margarine into the measuring cylinder slowly while keeping an eye on the water level. Stop pouring once the water level reaches 125ml. The amount of margarine you poured into the cylinder is now equivalent to 125ml.
2. Liquid measures, such as measuring cups and beakers, are frequently made of heat-proof glass such as Pyrex for several reasons:
a) Temperature resistance: Heat-proof glass, like Pyrex, is capable of withstanding high temperatures without breaking or shattering. This makes it suitable for use with hot liquids, such as boiling water or hot sauces.
b) Accuracy: Heat-proof glass is known for its transparency and durability. Its transparent nature allows you to see the liquid level clearly, ensuring accurate measurements. Additionally, its durability ensures that the measuring device remains intact even with continuous exposure to extreme temperatures.
c) Safety: Heat-proof glass is designed to resist thermal shock. This property means that it can withstand rapid temperature changes without breaking. This is important when measuring hot liquids, as sudden temperature changes could cause regular glass to crack or shatter.
In summary, using heat-proof glass like Pyrex for liquid measures provides the advantages of temperature resistance, accuracy, and safety, making them ideal tools for measuring and handling liquids in various culinary and scientific applications.
Put the margarine in a 250 ml container with 125 ml cold water.
Liquid measures may need to be heated.