How heat transfer occurs through radiation in absence of a medium?

How is heat transferred ?

Heat transfer occurs from which body to which body?

Does heat transfer by radiation need a material medium ?

Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points A and B are maintained at different temperature. The ratio of the heat transferred through a cross-section of a semi-circular rod to the heat transferred through a cross section of the straight red in a given time is

Ultra filtration occurs through physical principle called

Respiration occurs through gills in Scoliodon.

Maximum transpiration occurs through ......

How do you find work done, heat transferred and the change in internal energy for an isobaric process?

Decomposition occurs through which organisms?

Fill in the blanks : During the propagation of the wave through a medium, the ………………… of the medium do not change their positions.