Questions

Geraldine Mock "Jerry" was the first woman to fly around the world successfully in the year 1964.

The mammalian heartis called myogenic (myo = muscle, genie = originating from). It means the heart beat or the activities of the heart are auto regulated which originates from a muscle called nodal tissue.In the human heart,heartbeat originates and contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium; while the QRS waves are the depolarisation of the ventricles, which initiates the ventricular contraction.The T-wave represents the repolarisation,that is, the return of the ventricles from excited tonormal state.Hepatic portal system is the unique vascular connection that exists between the digestive tract and liver. This vein carries blood from intestine to the liver.

During the light reactions of photosynthesis the energy from sunlight is absorbed by the pigment chlorophyll present in the chloroplasts of the leafs.

According to psychologist Erik Erikson, Adolescence is the period of life between childhood and adulthood. They go through the psychosocial crisis of identity versus role confusion, which involves exploring who they are as individuals. During this stage, adolescents explore their independence and develop a sense of self i.e independent identity, ego nature.

When exposed to certain frequencies of radiation, such as radio waves, the subatomic particles called electrons that orbit an atom's nucleus will "jump" back and forth between energy states. Clocks based on this jumping within atoms can therefore provide an extremely precise way to count seconds.It is no surprise then that the international standard for the length of one second is based on atoms. Since 1967, the official definition of a second is 9,192,631,770 cycles of the radiation that gets an atom of the element called caesium to vibrate between two energy states.

India hold its first-ever lobal tourism mart at Vigyan Bhawan, New Delhi from september 16-18. It is modelled on the ITB Berlin, the world's largest tourism trade fair.