If areas of three circles are in ratio 4:9:25 what is the ratio of their radiii
Given that: Area of three circles are in the ratio 4:9:25 Let the radii of the three circles be a,b... View Article
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The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy. Why. Prove it
No. The process does not violate the law of conservation of energy. This is because when the body falls from... View Article
Resistance of a wire is R and cross section area is A now areas change to N times. What will be the new resistance?
Given that Resistance of a wire is R and cross-section area is A now areas change to N times. We... View Article
What is the age of sun?
The sun is the source of heat and light and the midpoint and for the solar system. It is made... View Article
Why AlCl3 does not show back bonding?
Back bonding is a type of resonance that is exhibited by several chemical compounds. Back bonding is known to offer... View Article
Write a short note on sonar and it working principle.
SONAR stands for SOund Navigation And Ranging. It is also referred to as echo ranging. It is a mechanical device... View Article
When f(x) = x4 – 2x3 + 3x2 – ax +b is divided by x+1 andx-1,we get remainders 19 and 5 respectively.find the remainder when f(x)is divided by x-3
Given that the equation f(x) = x4 – 2x3 + 3x2 – ax +b When f(x) is divided by (x+1)... View Article
Why is smell not a matter
Anything that has mass and occupies space is called matter. The three states of matter are solid, liquid, and gas.... View Article
A motorboat whose speed is 24km/hr in still water takes 1 hour more to go 32km upstream than to return downstream to the same spot find the speed of the stream
Given that: Total Distance = 32kmSpeed in Still Water = 24km/hLet the speed of the stream be ‘x’ km/hthen, Speed... View Article
Why is 120 degree the highest exterier angle for a regular polygon
An exterior angle is an angle which is formed by one of the sides of any closed shape structure such... View Article
Adams Apple is present in both girls and boys. TRUE/FALSE
False. Adam’s apple is mostly present in boys. The protruding part of the throat in boys is called Adam’s apple.... View Article
100:10. Express in simplest form
Given ratio 100:10 We need to express in simplest form Therefore 100_10=10:1 10:1 this is the simplest form.
Explain the term water of crystallisation
The water of crystallization means having a fixed number of molecules present in one formula of a unit of salt.... View Article
Write a short paragraph on the harmful effects of microorganisms.
Microorganisms are minute organisms that are invisible to the naked eye. Microorganisms are so small that they can only be... View Article
What is the principle.of electric generator
The electric motor, generator, and transformers all work on the principle of electromagnetic induction. The electric motor converts electrical energy... View Article
Why is sound wave is called longitudinal wave?
Longitudinal waves are the waves where the displacement of the medium is in the same direction, or in opposite direction,... View Article
Write a short note on osmosis.
Osmosis is a process by which the molecules of a solvent pass from a solution of low concentration to a... View Article
What is bio magnification?
Biomagnification or biological magnification is the process of accumulation of certain chemicals in living organisms to a concentration higher than... View Article
A triangle and parallelogram are constructed on the same base such that their area are equal. If the altitudes of the parallelogram is 100m, then find the altitude of the triangle.
Given that A triangle and parallelogram are constructed on the same base such that their area equal. We need to... View Article
Why does a desert cooler cool better on a hot dry day?
Answer: When a liquid evaporates, the particles of the liquid absorb energy from the surroundings to compensate the loss of... View Article
