Which of the following criterion is used for any metal to be used as a cooking material ?
A. More specific heat
B. More thermal conductivity
C. Less thermal conductivity
D. Less electrical conductivity
Answer: Option B
Solution(By Examveda Team)
For a metal to be used as a cooking material, it is important to have more thermal conductivity. This is because metals with high thermal conductivity quickly and evenly distribute heat, which is crucial for cooking. It allows for efficient and uniform heating of the cooking utensil, ensuring that food is cooked thoroughly and at a consistent temperatureThis Question Belongs to General Knowledge >> Physics
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Which of the following terms is not used in the field of physics?
A. Latent heat
B. Nuclear fusion
C. Refractive index
D. Stock value
Radiocarbon is produced in the atmosphere as a result of
A. Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
B. Action of ultraviolet light from the sun on atmospheric oxygen.
C. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
D. Lightning discharge in atmosphere.
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A. Work done in rolling is more than in lifting.
B. Work done in lifting the stone is equal to rolling it.
C. Work done in both is same but the rate of doing work is less in rolling.
D. Work done in rolling a stone is less than in lifting it.
The absorption of ink by blotting paper involves:
A. Viscosity of ink
B. Capillary action phenomenon
C. Diffusion of ink through the blotting
D. Siphon action
Option b is correct
More thermal conductivity is required.
More Thermal conductivity is required.
Are you under the impression that thermal conductivity doesn’t impact your life very much? In our thermal conductivity perspectives series we are setting out to prove you wrong! Understanding how thermal conductivity affects the objects that we use everyday can help us get the most out of them. A previous post discussed how knowing the difference in the thermal conductivity of different fabrics can help us decide what type of clothing to wear for certain weather conditions and activities. Today’s post will hopefully give you a better understanding of how the thermal conductivity of the utensils that you use in the kitchen affects your cooking, and will help you out the next time you’re shopping for new cooking supplies!
Thermal Conductivity Blog Chef Cooking
Figure 1. Some say cooking is an art, but there is a lot of science involved as well! 1
The transfer of heat forms the very basis of cooking, therefore it stands to reason that thermal conductivity plays a large role in the process. The equipment that you use in the kitchen is responsible for this transfer, and its thermal properties have the potential to make, or break, your cooking. When we think of materials that are used in the kitchen, metals are one of the first ones to come to mind. The majority of pots and pans are composed of metal, as it has a remarkable ability to resist heat. Metals also have high thermal conductivities compared to many other materials, however, the thermal conductivities of metals can vary substantially from one another.
Thermal conductivity is the ability of a material to transmit heat, therefore, a metal with a higher thermal conductivity will heat up faster than one with a lower thermal conductivity. This characteristic is sought after for cooking supplies, as a high thermal conductivity means that the heat from the stove will reach the food needing to be cooked more quickly. A high thermal conductivity also translates into a more even temperature across the cooking surface, which helps ensure that all of the food cooks equally. Ending up with food that is burned in the middle of the pan and still raw at the edges is not only irritating, but also wastes time and money! A high thermal conductivity also means that the pan will change temperature more quickly, which means that when you turn the knob on your stove from medium high to medium low, a high thermal conductivity pan will transmit that change in temperature to the food more efficiently than a low thermal conductivity pan.
Thermal Conductivity Blog Tc Cooking
Figure 2. This diagram shows the different stages of conduction that must occur to enable the heat from the stove top to reach the food being cooked.2
The thermal conductivity of a pot or pan also determines what it can be used for in the kitchen. For example, ceramics are incredibly popular for use in the oven, however, many people have accidently cracked ceramic dishes if they have tried to use them on the stove top. This happens because ceramics have a low thermal conductivity. As heat is transmitted more slowly across the material, a temperature gradient forms between the incredibly hot surface against the burner, and the cooler surface on the opposite side. If this gradient becomes too large, the ceramic cannot handle the stress, and simply cracks.
As mentioned above, not all metals are equal when it comes to cooking. In 1994, Gustavsson et al. measured the thermal conductivity of copper, aluminum, and brass using the Hot Disk TPS thermal conductivity system. Take a look at the table below to see the large variation in the thermal conductivity of the metals tested. Based on this table, which metals do you think would make up the best cooking equipment? Copper and aluminum are highly prized for use in the kitchen, however there is one catch. They are both reactive metals when it comes to food, which means they need to be coated with another material to make them safe for everyd
The right answer is high thermal conductivity