SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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thermal expansion of the water in the kernel
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thermal equilibrium of the water and the kernel
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thermal fusion of the water in the kernel
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None of the above
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Detailed explanation-1: -The soft starch is surrounded by the kernel’s hard outer surface. As the kernel heats up, the water expands, building pressure against the hard starch surface. Eventually, this outer layer gives way, causing the popcorn to explode.
Detailed explanation-2: -The energy that causes popcorn to change from kernels to fluffy white puffs is thermal energy. Thermal energy is the energy produced by the movement and attractions of the molecules within a substance.
Detailed explanation-3: -In the popcorn industry, a popped kernel of corn is known as a “flake". Two shapes of flakes are commercially important.
Detailed explanation-4: -Each kernel is made up of a plant embryo, a starchy endosperm that feeds the embryo, and a hard exterior called the bran or hull. And within each kernel is a small droplet of water-the key to its"pop". As heat is applied to the dried kernels, the droplet of water converts to steam, and pressure begins to build.