Do You Know
Questions & Answers on General Knowledge.
What is a magnet?
A magnet is an object that has magnetic poles and therefore exerts forces or torques (twists) on other magnets. There are two types of these magnetic poles—called, for historical reasons, north and south. Like poles repel (north repels north and south repels south) while opposite poles attract (north attracts south). Since isolated north and south magnetic poles have never been found in nature, magnets always have equal amounts of north and south magnetic poles, making them magnetically neutral overall. In a permanent magnet, the magnetism originates in the electrons from which the magnet is formed. Electrons are intrinsically magnetic, each with its own north and south magnetic poles, and they give the permanent magnet its overall north and south poles.
What do plasma, red blood cells, and white blood cells have to do with blood?
Did Napoleon conquer Russia?
Are some musical instruments really made of vegetables?
When was the first artificial satellite launched?
What is hell?
Why do we call male felines “tomcats”?
How long is the giant anteater’s tongue?
Do fish have senses?
What function does the Degauss button actually perform on computer monitors and why is it not available for televisions?
Why do north and south poles on magnets change back and forth?
How is there inertia on earth? I though that inertia was just in space.
Why do camera flashes make eyes red and why do two flashes correct this problem?
Can I be friends with a turtle?
How is sunlight both harmful and beneficial?
What are period, amplitude, and frequency?
How do flightless birds defend themselves from predators?
Which is the biggest monitor lizard?
What is a ray?
What does the inside of a microwave oven look like? Please show illustrations.
How does an electric lighter work?
Why do colors fade in the sun?
How do record players and their needles work?
What does a radio wave consist of? Is it any gas? I want to know what is the material that is carrying the data?
Why does a rubber ball transfer more forward momentum as the ball rebounds off an object?
How does ultrasound detect cracks or imperfections in metal? Is this to do with density or is it just reflecting off surfaces?
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