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Question 1 of 10
1. Question
An athlete cover 2.5 laps around a circular track in a time of 50 seconds. The diameter of the track is Om and its circumference 18 8m.The average speed of the athlete is
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Question 2 of 10
2. Question
The temperature in Kelvin to the nearest whole number at which the Celsius temperature is 2/3 Fahrenheit temperature is
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Question 3 of 10
3. Question
Which of the following statements is always true?
(I) Latent heat of vaporization of any substance is always greater than that of its fusion
(II) Heat transfer by convection requires no material medium
(III) Conduction taken place in solids
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Question 4 of 10
4. Question
How much water at 0°C is needed to cool 0.5kg of water of 80°C down to20°C?
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Question 5 of 10
5. Question
A partially inflated balloon contains 500m3 of helium at 270°C and 1 atm pressure. What is the volume of the helium at an altitude of 500m, where the pressure is 0.5 atm and the temperature is – 30°C?
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Question 6 of 10
6. Question
An object is placed 60cm from a concave mirror of focal length 15cm. Calculate the distance image from the mirror
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Question 7 of 10
7. Question
A body standing in front of a cliff c1a his hands. The echo is heard after I.6 sec. How far is the boy form the cliff? (Velocity of sound is 330m/s)
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Question 8 of 10
8. Question
The force attraction between two electric charges is 1800N. If the distance between them is tripled, what is the new force of attraction?
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Question 9 of 10
9. Question
One of the substances listed below is a good conductor of electricity
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Question 10 of 10
10. Question
A current of 2Aflowsthroughawater voltmeter. How long does it take to liberate 0.12g of hydrogen (e.c.e of hydrogen is 0.00001g) coul
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