The speed of sound in air is 60 m/s. How far from the centre of a storm is an observer who hears a thunder clap 4s after the flash of the lightning?
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2025
The movement of particles in liquids and gases is referred to as
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2025
The acceleration of the body given above ( upthrust = 10N)
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2025
Calculate the decay constant of a radioactive isotope of half-life 138.5 s.
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2025
A machine has an efficiency of 80%. If the input work is 200J, the output work is?
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2025
Some of the features of the human eye that greatly help to refract light entering the eyes are
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2025
Which of the following has the least thermal conductivity?
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2025
What form of energy is present in the food we eat?
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2025
The gravitational pull between two bodies is 20N. Find the gravitational pull when their distance of separation is doubled.
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2025
If the weight of an object on the Earth's surface is 2.5 x 10\(^3\)N, what is its weight on the moon's surface if the gravitational force of the moon is one-sixth of the Earth's(g = 10m/s\(^{-2}\))
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2025
What colour has the lowest frequency in the spectrum of white light?
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2025
From the above figure, a uniform meter rule is suspended by two cords from a height. Calculate T?
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2025
The commonly used materials for shielding or screening magnetism is
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2025
A bore made in an aluminium block at 34ºC is 3.48cm\(^3\). What is the new bore when the temperature was raised to 340ºC [α\(_a\) = 24 x 10\(^{-6}\)K\(^{-1}\)]
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2025
5400kJ of heat energy was lost when some amount of steam condensed to water for drinking purposes at 15º C. What is the quantity of water collected? [L\(_f \) = 2.26 × 10\(^6\) Jkg\(^{-1}\), c\(_w\) = 4200 Jkg\(^{-1…
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2025
Without considering the containing vessel, what mass of boiled water can raise the temperature of 8 kg of water from 25°C to 60°C when mixed in a heat-proof container?
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2025
An annular eclipse is formed when
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2025
The gravitational force between two masses, P and Q, is 10N, find the new value of the force if both masses are doubled
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2025
A Force 18 N pulls a 40 kg mass on a horizontal floor at 0.3 ms\(^{-2}\). Find the coefficient of friction.
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2025
The distance between two successive trough points of a wave is