Use Graph paper for this question.

A survey regarding height (in cm) of 60 boys belonging to Class 10 of a school was conducted. The following data was recorded:

Taking 2 cm = height of 10 cm along...

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
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If the straight lines 3𝑥 - 5𝑦 = 7 and 4𝑥 + 𝑎𝑦 + 9 = 0 are perpendicular to one another, find the value of a

In the electroplating of an article with silver, the electrolyte sodium argento cyanide solution is preferred over silver nitrate solution.

Give reasons why:

Give a reason: Thar is a desert

What is the term of office of a Rajya Sabha member?

An apparatus that measures the rate of water uptake in a cut shoot due to transpiration. 

Give appropriate biological / technical term.

1. What do you understand by free vibrations of a body?
2. Why does the amplitude of a vibrating body continuously decrease during damped vibrations?

From the top of a cliff, the angle of depression of the top and bottom of a tower are observed to be 45 and 60° respectively. If the height of the tower is 20 m. Find:

1. the height of the cliff
2. the
...

Given below is the outline of the human body showing the important glands:

1. Name the glands marked 1 to 4.
2. Name the hormone secreted by part 2. Give one important function of this hormone.
3. Name the
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State any two provisions of the Indian Independence Act of 1947 that was to decide the fate of the Princely States?

A stone of mass ‘m’ is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand.

Answer the following questions:

1. Is the stone moving with a uniform or
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Solve the following Quadratic Equation: x² - 7x + 3 = 0. Give your answer correct to two decimal places.

Explain the following terms and name the crop with which each is associated:

1. Retting
2. Ratooning
3. Ginning

If an element has a low ionization energy then it is likely to be __________ (metallic / non metallic).

Mention any two functions of UNESCO in the field of Education