Student Questions

Birds are able to fly while we humans can't fly. This is because the birds have less weight than humans. Why is their weight less?

Which animal has 4 legs and a beak like a duck ?

A rectangular wooden block has a weight of 40 N. The dimensions of the block are 20 cm x 10 cm x 5 cm. The block is placed on a table in two different ways: Position A: Lying on its widest face (20\text{ cm} \times 10\text{ cm}). Position B: Standing on its narrowest face (10\text{ cm} \times 5\text{ cm}). Calculate the pressure exerted by the wooden block on the table in both positions. In which case is the pressure higher, and why?

In a circle with center O, AB is a diameter. Let C be a point on the circumference such that \angle ABC = 30^\circ. A tangent is drawn to the circle at point C, which intersects the extended diameter AB at point P. If the radius of the circle is r, what is the area of triangle BCP?

Δ x 7 = 7 + 7 + 7 + 7 Then what is the value of Δ x 6 ?

4(x-3)=2x+22 Find the value of x.

Consider the following statements and choose the correct option: (1) The mass of 15 moles of H? is 30 g. (2) The number of moles present in 128 g of O? is 4.

Which of the following options, when unscrambled, gives the names of the homes of a bird and a dog?

Read the conversation and choose the correct modes of communication X and Y. Alex: My uncle sent a wedding invitation by X so that it reaches me on time. Ben: I received Y from the bank today and sent my documents through Y again.

In research, it is proved that in old age one should take more quantity of proteins in the diet than any other group of food. Which of the following justifies this?

Read the following statements: (1) The muscles of the heart are voluntary muscles. (2) The ear lobes and lips do not have bones. (3) The spinal cord along with the brain forms the main part of the nervous system. (4) The elbow and knee have ball and socket joint. Which of the above statements is/are incorrect?

Consider the following statements: (1) The formation of dew is a physical change. (2) The explosion of bombs is an endothermic process. (3) Dissolution of common salt can be reversed by heating. Which of the above statements is/are correct?

An iron ball at 49�C is dropped in a beaker containing water at 409.19 K. Identify the correct statement regarding the heat flow.

A sharp knife enables us to cut through things more easily because __________________.

Fill in the blank using an appropriate word: I have ________ pair of shoes.

Fill in the blank using the correct punctuation mark: Are you feeling well today ___

Identify the possessive pronoun in the sentence: Which shirt is yours?

Fill in the blank with an appropriate preposition: The crane tipped ____ from the hill.

Which two words in the following sentence are conjunctions? I was taught that neither the way of progress was swift nor easy.

Read the passage and answer the question: In the past, India was known for her fine textiles, muslins and brocades of silver and gold. The ancient Indian iron and steel industry was equally famous. The famous Damascus steel for swords and armours used in crusades came from India. Thus in countless industries and crafts, the Indian craftsmen, builders, workers and artists created and prospered. Later, political disintegration and foreign conquest closed the long golden chapter of India's advancement and creative achievement. Which of the following is opposite in meaning to the word "advancement" occurring in the passage?