In which of the given chemical reactions, does the displacement reaction occur ?

A person walks 50 m on a level road with a load of mass 20 kg on his head. If so the work done by the force on the load is:

A body is moving with a velocity 50 m/s On applying a force on it, it comes to rest in 5 s. If so the retardation is:

Which among the following is the concentration method of bauxite?

Two capillary tubes A and B of diameter 1 mm and 2 mm respectively are dipped vertically in a liquid. If the capillary rise in A is 6 cm, the capillary rise in B is

64 × 54 = ?

44 × 15 =

36 × 12 =

363 × 99 =

4542 × 9999 =

638 × 999 = ?

99 × 43 = ?

The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minutes ? (use ∏=3.14)

If the arcs of the same lengths in two circles subtend angles 65° and 110° at the centre, find the ratio of their radii.

A wheel makes 360 revolutions in 1 minute. Through how many radians ddoes it turn in one second .

Find the radius of the circle in which a centrall angle of 60° intercepts an arc of length 37.4 cm (use ∏=22/7)

Convert 6 radian into degree measure.

sin A = 1/2 and cos B = 1/2 , then the value of (A+B) is

In triangle ABC ,