Which of the two changes frequently, weather or climate?
Answer: Weather changes frequently but not climate. A climate is average weather in a given area over a period of... View Article
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Which one of the following forces is a contact force? (a) force of gravity (b) force of friction (c) magnetic force (d) electrostatic force
Answer: (b) force of friction Contact force Contact force is a force that is applied by objects in contact with... View Article
Which one of the following places is unlikely to be affected by a cyclone? (i) Chennai (ii) Mangaluru (Mangalore) (iii) Amritsar (iv) Puri
Answer: (iii) Amritsar Cyclone is defined as the mass of air that rotates around the centre of low pressure on... View Article
Which one of the following solutions will not conduct electricity? (a) lemon juice (b) vinegar (c) tap water (d) vegetable oil
Answer: (d) vegetable oil Because vegetable oil is lacking ions, it is unable to conduct electricity. Conductors of electricity Materials... View Article
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
Answer: If a person is suffering from a cataract their eye lens will be cloudy. Cataracts can be treated by... View Article
While sieving grains, small pieces fall down. Which force pulls them down?
Answer: Force of gravity is responsible for the grains to fall down. Gravitational Force According to Newton’s universal law of... View Article
While travelling on a rickshaw, you might have experienced that if the seat cover is very smooth, you tend to slip when brakes are applied suddenly. Explain.
Answer: The friction between the seat and our body is minimized if the seat cover is very smooth. As a... View Article
Why does the moon change its shape daily?
Answer: Because the moon revolves around the earth, its form varies on a daily basis, and we only see the... View Article
Why is a layer of zinc-coated over iron?
Answer: Rust is developed when iron reacts with ambient air. Zinc is coated with iron to keep it from rusting.... View Article
Why is tin electroplated on iron to make cans used for storing food?
Answer: Electroplating is the process of aligning another metal onto a metal. This is accomplished using an electroplating apparatus that... View Article
Why should oils and fats be not released in the drain? Explain.
Answer: Sewage is the wastewater released by hospitals, homes or industrial establishments that is carried away in sewers or drains... View Article
Why should we worry about the conditions and issues related to forests far from us?
Answer: A forest is a dense land or a complex ecosystem that supports a diverse range of life forms and... View Article
Will force of friction come into play when a raindrop rolls down a glass window pane?
Answer: Frictional force refers to the force generated by two surfaces that contact and slide against each other. Friction is... View Article
Will the solution of sugar in distilled water conduct electricity?
Answer: The sugar solution is neither acidic nor basic, and it is unable to ionise and conduct electricity. Sugar solution... View Article
Wind is_____air.
Answer: The wind is moving air. Uneven heating of the Earth’s surface causes winds. On being heated, the air becomes... View Article
Winds are generated due to______heating on the earth.
Answer: Winds are generated due to uneven heating on the earth. Uneven heating of the Earth’s surface causes winds. The... View Article
Without actually calculating the cubes, find the value of the following: (-12)3 + (7)3 + (5)3
Answer: – 1260 Given (-12)3 + (7)3 + (5)3 We know that, x3 + y3 + z3– 3xyz = (x... View Article
Without actually calculating the cubes, find the value of the following: (28)3 + (-15)3 + (-13)3
Answer: 16380 Given (28)3 + (-15)3 + (-13)3 We know that, x3 + y3 + z3– 3xyz = (x +... View Article
Work out the following division: (10x – 25) ÷ (2x – 5)
Answer: 5 The four important terms used in the division operation are dividend, divisor, quotient and remainder. The formula to... View Article
Work out the following division: (10x – 25) ÷ 5
Answer: (5x – 5) The four important terms used in the division operation are dividend, divisor, quotient and remainder. The... View Article
