Question 14
Question: List out any two uses of concave mirror. Answer: Concave mirrors are used 1) as reflectors in the head lights of cars, search lights, etc. to obtain a parallel beam of light. 2) by dentists to focus light on the patient's tooth to be examined..
Activity - I
Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is throug..
Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is throug..E- waste
E-waste What contributes to e-waste? Discarded electronic devices like televisions, personal computers, floppies, audio-video CDs, batteries, electric switches, telephones, air conditioners, cellphones, electronic toys, refrigerators, washing machines, dryers, kitchen utensils and eve..
Introduction
The cells that make up our body are so small that you could fit over 200 of them on the full stop at the end of this sentence Before we plunge into the chapter, here are some interesting facts about cells. Read on... The word cell is derived from the Latin word cellula which means a little ..
The Fundamental Unit of Life Introduction
Introduction - The cells that make up our body are so small that you could fit over 200 of them on the full stop at the end of this sentence Before we plunge into the chapter, here are some interesting facts about cells. Read on... The word cell is derived from the Latin word cellula which means a ..
Uses of Concave Mirrors
Concave mirrors are used for the following purposes: As reflectors in the head lights of cars, search lights in torches etc. to obtain a parallel beam of light. For this, the source of light is placed at the focus of the concave reflector. By dentist to focus light on the tooth to be examinedh..
Concave mirrors are used for the following purposes: As reflectors in the head lights of cars, search lights in torches etc. to obtain a parallel beam of light. For this, the source of light is placed at the focus of the concave reflector. By dentist to focus light on the tooth to be examinedh..Introduction
) who experimented with electricity and made major inroads in understanding the phenomenon. By the middle of the eighteenth century, there were machines that could generate large electrical charges. Static electricity may produce dramatic effects but it is of very little practical use to us. It is ..
) who experimented with electricity and made major inroads in understanding the phenomenon. By the middle of the eighteenth century, there were machines that could generate large electrical charges. Static electricity may produce dramatic effects but it is of very little practical use to us. It is ..Structure of Atom
When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are about 60,000,000,000,..
When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are about 60,000,000,000,..The Computer Science Department had 24 students in the year 2002. If 1..
The Computer Science Department had 24 students in the year 2002. If 10 of these students failed, then how many students graduated? => 18 or 10 or 14 or 34..
The computer science department had 28 students in the year 2002. If 1..
The computer science department had 28 students in the year 2002. If 14 of these students failed, then how many students graduated? => 42 or 22 or 6 or 14..
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