Why is the base of a cooking pan generally made thick?

The angle of elevation from a point P of the top of a tower QR, 50 m high is 60^o and that of the tower PT from a point Q is 30^o. Find the height of the tower PT, correct to the nearest metre.

In a class of 40 students, marks obtained by the students in a class test (out of 10) are given below:

Calculate the following for the given distribution: i. Median ii. Mode

You have a choice of three metals A, B and C, of specific heat capacities 900 Jkg^{- 1o}C^-1, 380 Jkg^-1oC^-1 and 460 Jkg^-1oC^-1 respectively, to make a calorimeter. Which material will you select?...

If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 cc of B?

1. The gases A and B are under the same conditions of temperature and pressure.
2. Name the law on which
...

The process of coating of iron with zinc.

Calculate: The volume occupied by 80 g of carbon dioxide at STP.

Acid rain is harmful to the environment.

Briefly explain: Rooftop rainwater harvesting

A ray of light travels from water to air as shown in the diagram given below:

1. Copy the diagram and complete the path of the ray. Given the critical angle for water is 48°.
2. State the condition so
...

The accessory gland in human males whose secretion activates the sperms.

Give appropriate biological / technical term.

Mature erythrocytes in humans lack nucleus and mitochondria.

Give scientific reason.

Mention any three qualifications required for a member to be elected to the Lok Sabha.

The onset of menstruation in a young girl.

Give appropriate biological or technical terms for the following:

Epididymis

Mention the exact location.

State the body that decides the major policies of the Government.