Do You Know
Questions & Answers on General Knowledge.
How are a water lily’s leaves different?
A water lily is a floating aquatic plant with large, fragrant, white or pink flowers and flat, round, floating leaves. The leaves have long stems and are bright green above and reddish or purplish underneath. The underside of the leaf contains air spaces; the air that traps beneath the leaf makes it float on water. The leaves’ strong stems help them grow and stay upright in the water—which allows the leaves to absorb sunlight and stay alive.
How does an ultrasonic bath work?
What happens to water in space?
Is heating milk by microwave advisable?
Can you see out of sunglasses which shade both horizontally and vertically polarized light?
Who was Gutenberg?
How do submarines sink below the water and then rise?
What forces are involved when hitting the sweet spot of a baseball bat?
How do an ammeter and voltmeter work? Why must the former be connected in series while the latter goes in parallel?
Why is it that the times at which the moon sets and rises change so much from day to day?
How do neon lamps work?
What is matter made of?
How does a projector work?
Can electricity make my hair stand on end ?
What are the relationships between Joules, Coulombs, Amperes, Volts, and Watts?
What is a fish farm?
Why do local telephone numbers never start with the number one?
What were the earliest paintings about?
Why do we say,“Never look a gift horse in the mouth”?
How do you make an energy converter to convert water into energy?
If light has no mass, then how can it be affected by gravity? What property of light is gravitational force acting on?
What is a barometer?
What are sungrazers?
How did the Mughals keep the Empire together?
Were ancient Greeks good at art?
Why is a car's rear window put and kept under stress, and what has this to do with polarization?
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