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Submarines submerge and surface by changing the average density of the hull.
Waves play an extremely important role in many areas of our lives.
How does a piece of a cork behave on the surface of a glass of water? You can examine that in...
Can we break a stick with the weight of only a few sheets of paper?
A force can be measured by measuring the twisting of the torsion wire in a torsion balance.
A hot air balloon is a balloon aircraft which is lifted by hot air.
This animation demonstrates Sir Isaac Newton's three laws of motion that laid the...
High speed generates a lift on aeroplane wings due to their asymmetrical profile.