Questions

Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So by Newton's first law, it continues its motion horizontally with that velocity. But then, it is also pulled down by earth's gravity continuously. In this situation its horizontal motion gives way to the parabolic motion until it reaches the ground.

The red blood corpuscles  or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.

a -  at the peak of changes in blood pressure indicates the systiolic pressure.

Turbines are machines powered by rotating blades.

On December 4, 1971, the Indian Navy successfully executed Operation Trident, which was a devastating attack on Pakistan Naval Headquarters in Karachi. The operation, which marked the first use of anti-ship missiles in the region, did irreparable damage to the Karachi port during the 1971 Indo-Pak war. To commemorate this, December 4 is celebrated as the Indian Navy Day.

Every year to celebrate the achievements and role of the naval force to the country we clebrate Navy Day. The Indian Navy is the marine branch of the Indian Armed Forces and is led by the President of India as Commander-in-Chief.