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Give a scientific explanation.
A certain type of ceramic tile is fixed on the outer layer of a space shuttle.
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Write about artificial food colours, the substances used in them and their harmful effects.
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Write the harmful effects.
Artificial dye
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Write the harmful effects.
Artificial food colour
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Write the harmful effects.
Deodorant
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Explain what you see in the following picture.
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A 10 cm long stick is kept in front of a concave mirror having a focal length of 10 cm in such a way that the end of the stick closest to the pole is at a distance of 20 cm. What will be the length of the image?
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Complete a sentence and explain it.
When an object is in uniform circular motion, its ______ changes at every point.
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Write the steps in deducing the chemical formulae of the following compound.
Sodium sulphate
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M is a bivalent metal. Write down the steps to find the chemical formulae of its compounds formed with the radicals, sulphate and phosphate.
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Explain with suitable examples, the care to be taken when using the methods of transporting patients.
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Write note.
Principles of first aid.
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How is first aid provided to victims of disasters who are injured?
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Explain the following.
Use of CO2 in fire extinguisher.
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A convex mirror has a focal length of 18 cm. The image of an object kept in front of the mirror is half the height of the object. What is the distance of the object from the mirror?
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An object of height 7 cm is kept at a distance of 25 cm in front of a concave mirror. The focal length of the mirror is 15 cm. At what distance from the mirror should a screen be kept so as to get a clear image? What will be the size and nature of the image?
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Write the steps in deducing the chemical formulae of the following compound.
Potassium nitrate
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Write the steps in deducing the chemical formulae of the following compound.
Ferric phosphate
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Write the steps in deducing the chemical formulae of the following compound.
Calcium oxide
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Write the steps in deducing the chemical formulae of the following compound.
Aluminium hydroxide
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