Questions

Helioseismology is the study of the solar interior using observations of waves on the Sun's surface. It has done much to improve our understanding of the interior of the Sun, testing the physical inputs used to model stellar interiors and providing a detailed map of the Sun's structure and internal rotation.

Heat transfer through radiation takes place in form of electromagnetic waves mainly in the infrared region. It depends on nature of the body, its temperature and kind & extent of its surface.

The artificial kidney is the dialysis machine. Blood from the body is fed into the machine which removes nitrogenous wastes like urea and returns the blood back to the body.People with renal failure have to use this machine.

Hispar and Beturaof the Hunza valley are over 57km long. They are the largest glaciers. Biafo and Baltaro of the shigar valley are 60 km long

Drowsiness is the state of feeling sleepyness and tired in the day time. It affects our senses especially the sense of vision.