Which of the following is used a nuclear reactor to slow down fast moving neutrons?
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1996
A body of mass 4.2kg moving with velocity 10ms-1 due east, hits a stationary body of mass 2.8kg. If they stick together after collision and move with velocity V due east, calculate the value of V
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1996
A platinum-resistance thermometer has a resistance of 59 at 0oC and 9Ω at l00oC. Assuming that resistance changes uniformly with temperature, calculate the resistance of the thermometer when the temperature is 45oC
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1996
The inside of a vacuum flask is usually coated with silver to reduce heat lost by
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1996
A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object?
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1996
The distance between two successive crests of a water is 1m. lf a particle on the surface of the water makes two complete vertical oscillations in 1 second, calculate the speed of the wave
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1996
The resistance in a series R-C circuit is 5 Ω. If the impedance of the circuit is 13 Ω, calculate the reactance of the capacitor
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1996
A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object?
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1996
A wire of length 100cm and cross-sectional area 2.0 × 10-3cm2 has a resistance of 0.10 ω. Calculate its electrical conductively.
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1996
The resistance of a series R-C circuit is 5 ω If the impedance of the circuit is 13 ω calculate the reactance of the capacitor
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1996
A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C…
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1996
The distance between two successive crests of a water wave is 0.5m. If a particle on the surface of the water wave makes two complete vertical oscillations in 1s, calculate the speed of the wave.
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1996
An object of mass 5.0 cg moving with a velocity of 12ms-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.