Question

By his famous experiment, Otto von Guericke demonstrated the presence of _____.
(A) Atmospheric pressure
(B) Force
(C) Magnetic force
(D) Friction

Answer 1

Hint: It is the phenomenon by which the molecules present in the air exerts force on everything around it. The absence of which will cause the animals to explode.

Complete answer:
-In the given question, we are given the name of one of the scientists named as Otto von Guericke and we are asked to find the contribution he made in the field of science.To answer this question, we will go through each one of the given options and the famous scientist behind it.
-Let us discuss the following terms atmospheric pressure, force, magnetic force and friction.
Friction is a force between two surfaces that slip over each other, or attempt to slide. When you try to manoeuvre a book around the board, for instance, friction makes this impossible. In the direction opposite to the direction in which the object is going, or attempting to travel, friction still works. The famous scientist behind the concept of friction was Leonardo Da Vinci.
-A force is a push or pull on an object that results from the contact of the object with another object. There is a force on each of the objects if there is an interaction with two objects. Isaac Newton discovered force.Due to their motion, magnetic force, attraction or repulsion that occurs between electrically charged particles. It is the underlying force responsible for phenomena such as the operation of electric motors and the iron attraction of magnets. The famous scientist behind the concept of magnetic force was Hans Christian Oersted.There is weight in the air surrounding you, and it pushes on anything it touches. Atmospheric pressure, or air pressure, is what the pressure is called. Usually, air pressure is measured with a barometer. In a barometer, as the weight of the atmosphere increases, a column of mercury in a glass tube rises or falls. The famous scientist behind the concept of atmospheric pressure was Otto von Guericke.From the above discussion we can say that Otto von Guericke demonstrated the presence of atmospheric pressure.

The correct option is A.

Note: It is important to note that the atmosphere is held to the earth by the gravitational force of the earth. The gravity of the earth pulls the atmosphere of the earth which we call pressure. As the height of a region increases, the pressure of that region decreases. This is due to the fact that the air becomes less dense in that particular region.