Find the thickness of a five rupee coin with the screw gauge, if the pitch scale reading is 1 mm and its head scale coincidence is 68.

Calculate the positive and negative error from the given figure

A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 ms^-2 with what velocity will it strike the ground? After what time will it strike the ground?

Draw a ray diagram to show the formation of image by a concave mirror for an object placed between its pole and Principal focus and state three characteristics of the image.

State the Gay Lussac’s law of combining volumes, explain with an illustration.

Give an account of class Mammalia.

A charge of 400C flows through a conductor for 13 minutes and 20 seconds. Find the magnitude of the current flowing through the conductor.

Explain the principle, construction and working of a dc motor.

Explain the principle, construction and working of a AC generator.

List down the differences between Ionic and Covalent compounds.

Plaster of Paris should be stored in a moisture proof container. why?

Write notes on the properties of acids.

If cell (A) has undergone one mitotic division and another cell (B) has completed its meiotic division. The number of cells produced in A and B would be
Cell A:                       Cell B :

Write a note on functions of liver in digestion.

What are the factors, in which the intensity of sound depends?

Batteries that are used in mobile phone can be recharged. Likewise, can you recharge the batteries used in watches? Justify your answer.

What are the characteristics of drugs?

Give an account of different types of fish ponds used for rearing fishes.

List out the measures to be taken to prevent vector borne diseases transmitted through mosquitoes.