The average weight of an adult human brain is approximately 1.5 kilograms. The option 121 kilograms is the closest value.
97. The big brain is called
(A) Cerebellum
(B) Cerebrum
(C) Medulla
(D) Spinal Cord
Answer:
(B) Cerebrum
Explanation:
The cerebrum is the largest part of the human brain and is often referred to as the “big brain”.
98. A fishing rod is a ______ kind of lever.
(A) I
(B) II
(C) III
(D) IV
Answer:
(C) III
Explanation:
A fishing rod is an example of a Class III lever, where the effort is applied between the fulcrum and the load.
99. The weight of an object in water is called
(A) Actual weight
(B) Apparent weight
(C) False weight
(D) True weight
Answer:
(B) Apparent weight
Explanation:
Due to the upthrust or buoyant force from the water, an object’s measured weight is less than its actual weight. This perceived weight is called apparent weight.
100. ______ found out that the up thrust is always equal to the weight of the water displaced.
(A) Isaac Newton
(B) Archimedes
(C) Graham Bell
(D) Albert Einstein
Answer:
(B) Archimedes
Explanation:
This principle, which states that the upward buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object, was discovered by Archimedes.
