Grade 6 Discover : Set 2 Copy
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A gravity hill is a place where the layout of the surrounding is such that it produces an optical illusion of a downhill slope appearing to be an uphill one.
Thereby, a parked car in this area would slowly start moving towards what looks uphill but is actually downhill.
Due to this property of gravity hills, they are also called what?CorrectIncorrect
It is attracting the car, gravity is pulling it closer.
William Gilbert, an English physician experimented with a versorium, an instrument consisting of a metal needle and a round lodestone called a terella.
He found that the dip of the versorium varied as it moved around the terella and it was quite similar to the dip shown by a compass needle at different points on the surface of the earth.
Therefore he came up with what sticky conclusion?CorrectIncorrect
Robert-Houdin a magician, in one of his tricks, invited a strongman to lift a wooden chest with an iron bottom on stage. At first, he could do so, but after Houdin used his magical gesture, he was not able to do so.
This was possible because, in the second instance, he let electricity flow through an object on the stage.
This simple trick is one of the earliest uses of what?CorrectIncorrect
The strength and poles of this magnet can be changed
Demagnetisation is the process of removing or reducing the magnetic field of an object. This can either be done by constant hammering or applying heat.
The temperature at which demagnetisation occurs is known as ______ point.
It is named after the famous scientist duo who were the first married couple to win a Nobel Prize.
This family is the recipient of 5 Nobel Prizes in total.