The mean of the following data is 16. Calculate the value of f

Give a reason: Water transport is not as popular as land transport in India

The wave lengths for the light of red and blue colours are nearly 7.8 x 10^-7 m and 4.8x 10^-7 m respectively.

1. Which colour has the greater speed in a vacuum?
2. Which colour has a greater speed in
...

Name the following: A metallic mineral for which the Balaghat district of Madhya Pradesh is famous.

An effort is applied on the bigger wheel of a gear having 32 teeth. It is used to turn a wheel of 8 teeth. Where is it used?

What is meant by Appellate Jurisdiction of the Supreme Court?

A copper vessel of mass 100 g contains 150 g of water at 50°C. How much ice is needed to cool it to 5°C?

Given : Specific heat capacity of copper = 0.4 J g^-1 ⁰C^-1
Specific heat capacity of water =...

Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of their:

(i) intensities and

(ii) frequencies?

Action of hot and concentrated Nitric acid on copper.

Write balanced chemical equation.

With reference to Littoral forest, Name one area in India where this forest is found.

What is rain water harvesting?

The element with highest ionization potential is:

1. Hydrogen
2. Caesium
3. Radon
4. Helium

A virtual, diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.

1. Name the type of lens which forms the above image.
2. Draw a ray diagram to
...

Na, K, Li (Increasing atomic size)

State two ways to increase the speed of rotation of a D.C. motor.

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

Give appropriate biological / technical term.