Which of the following is an example of heat transfer by convection? question 2 options: the coils of a toaster become red. a hot wood stove heats an entire room. a teaspoon in a glass of hot tea becomes warm. the handle of a pot that is being heated becomes warm.

The correct option is B. A hot wood stove heats an entire room.

Explanation:

Convection can be described as a method of heat transfer in which heat is transferred by a medium like a gas or a fluid.

The warmer air has less density as compared to cooler air. Hence, convection currents are generated which transfer heat.

In the option B, heat is being transferred by the particles of the air. The air near the stove is warmer as compared to the air in other parts of the room. Hence, a convection current is generated which transfers the heat.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

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