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1) In a 200 metres race A beats B by 35 m or 7 seconds. A's time over the course is
No Explanation found. Add Explanation and get +2 points.
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2) A, B, C subscribe Rs. 50,000 for a business, A Subscribes Rs. 4000 more than B and B Rs. 5000 more thanC. Out of a total profit of Rs. 35,000, A receives
Explanation :
Let C = x. Then, B = x + 5000 and A = x + 5000 + 4000 = x + 9000.
So, x + x + 5000 + x + 9000 = 50000 <=> 3x = 36000 <=>
x = 12000.
A : B : C = 21000 : 17000 : 12000 = 21 : 17 : 12.
A's share = Rs. (35000 * 21/50 ) = Rs. 14,700.
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3) The area of a square is 30.25 cm². Find its perimeter (in cm)
No Explanation found. Add Explanation and get +2 points.
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4) In a vacuum, all electromagnetic waves have the same
Explanation :
When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, realtively speaking. But frequency and wavelength are quite different.
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5) When an object travels equal distances in equal intervals of time, it moves with ______________ speed.
No Explanation found. Add Explanation and get +2 points.
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6) On the Kelvin scale ,the melting point of ice is
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7) When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is
Explanation :
Red is deviated the least and violet the most
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8) A car parked in the sun with its windows closed gets terribly hot inside. This is due to
Explanation :
The green house effect. The waves of smaller wavelength from the sun enter inside the car through the glass windows and are absorbed. The waves of larger wavelength emitted from inside cannot get out through the glass, but remain inside and make it terribly hot.
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9) Which of the following is measured in the unit called Gauss?
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10) A small hole in the window forms an inverted image on the opposite wall due to
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