Physics
Motion
Easy
Question
A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is
- 50
- 53.33
- 48
- 70
The correct answer is: 53.33
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A magnifying glass is placed in the path of sun rays, and a sharp point-sized image of the Sun is obtained on a paper placed on the other side of the magnifying glass. This image is formed at the ___ of the glass.
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A lens can always form both real and inverted and virtual and upright images of an object placed in front of it. It is a ____ lens.
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