The seed ofa corn has dimensions `1.8cmxx0.8cmxx0.2cm`. The height of the corn-tube is 13.7 cm and its radius is 4.2 cm. assuming that the corn-seeds have negligible distance between them and all seeds are of same size, find the number of seeds on the corn-tube.

The height of water in a capillary tube os radius 2 cm is 4 cm . What should be the radius of capillary , if the water rises to 8cm in tube ?

Two discharge tubes have identical material structure and the same gas is filled in them. The length of one tube is 10cm and that of th other tube is 20cm. Sparking starts in both the tubes when the potential difference between the cathode and the anode is 100 V . If the pressure in the shorter tube is 1.0 mm of mercury, what is the pressure in the longer tube?

The dimensions of a block are 1cmxx1cmxx100cm. If the specific resistance of its material is 2xx10^(-7) ohmxxmetre , then the resistance between the opposite rectangular faces is

Radius of circular base of an ear of corn is 6.6 cm and its length is 11.2 cm . If on an average 1 sq cm area contains 2 corn kernels , fnd the total number of kernals on a corn

The number of coins, each of radius 0.75 cm and thickness 0.2 cm, to be melted to make a right circular cylinder of height 8 cm and base radius 3 cm is

Find the number of coins 1.5 cm in diameter and 0.2 cm thick to be melted to form a right circular cylinder of height 5 cm and diameter 4.5 cm