Questions

The chemical element gold has an atomic number 79 is present in period 6 and group 11 of the periodic table.

17C2 = 136 (combination)

A bottle has a mouth from which we used to drink water or any juice. But it cannot smile.

Budapest is the capital of Hungary

Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So by Newton's first law, it continues its motion horizontally with that velocity. But then, it is also pulled down by earth's gravity continuously. In this situation its horizontal motion gives way to the parabolic motion until it reaches the ground.

Representative money is an item such as a token or piece of paper that has no intrinsic value but can be exchanged on demand for a commodity that does have intrinsic value, such as gold, silver, copper,...

Hence, a Check is an example of representative money.