(there are 3 quetions) how is heat being transfered in: 1. conduction
2.convection
3.radiation
Please answer as soon a possible

Since I already answered the first two I will tell you the third one!

In general, the radiation heat transfer from one surface to another is the radiation leaving the first surface for the other minus that arriving from the second surface. Radiation heat transfer is mediated by electromagnetic radiation, known as thermal radiation, that arises due to the temperature of a body.

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the volume of fluid displaced would equal the volume of the gas. use a gas syringe - this is a laboratory instrument that can be used to withdraw a certain volume of gas from a closed system or to measure the volume of gas from a chemical reaction.

they are made of gases.

they have a spherical shape.

they make energy through fusion.