If the earth were to suddenly contract so that its radius become half of it present radius, without any change in its mass, the duration of the new day will be....

If the angles of the Δ ABC are in A.P then 3R²=1

s denotes the semi-perimeter of the triangle ABC, ∆ its area and R the radius of the circle circumscribing the triangle ABC i.e., R is the circum-radius.

Two circular loop A & B of radius r_A and  r_B respectively are made from a uniform wire. The ratio of their moment of inertia about axes passing through their center and perpendicular to their planes is   is equal to...

In 

s denotes the semi-perimeter of the triangle ABC, ∆ its area and R the radius of the circle circumscribing the triangle ABC i.e., R is the circum-radius.

In 

A cylinder of mass 5 kg. and radius 30 cm, and free to rotate about its axis, receives an angular impulse of 3 kgM²  S^-1 initially followed by a similar impulse after every 4sec. what is the angular speed of the cylinder 30 sec after initial emulse ? The cylinder is at rest initially

In 

A body of mass m  is tied to one end of spring and whirled round in a horizontal plane with a constant angular velocity. The elongation in the spring is one centimeter. If the angular velocity is doubted, the elongation in the spring is 5 cm. The original length of spring is..

In 

Let n be the number of points having rational coordinates equidistant from the point

Both sickle cell anemia and Hunington’s chorea are :

HIV that causes AIDS, first starts destroying

A very much publicised treatment method ‘DOTS’ is being adopted for the cure of

Sickle cell anaemia is due to

In figure, and then the area of the shaded region in square units is

In the figure, and ar The value of ?