How many laws of physics are there?
A. 5
B. 4
C. 3
D. 2
Answer: Option B
Solution(By Examveda Team)
Physics
is a complex science with several fundamental principles and laws that govern the behavior of the physical world. While there are numerous principles and equations in physics, there are four fundamental laws, also known as the "Four Fundamental Forces of Nature," that are considered the cornerstone of classical physics. These are:1. Newton's First Law of Motion: The law of inertia.
2. Newton's Second Law of Motion: F = ma.
3. Newton's Third Law of Motion: Action and reaction are equal and opposite.
4. Law of Universal Gravitation: The force of attraction between two masses.
These laws are essential for understanding classical mechanics and are often referred to as the "laws of physics." So, the correct answer is Option B: 4, representing the four fundamental laws of physics.
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Which of the following terms is not used in the field of physics?
A. Latent heat
B. Nuclear fusion
C. Refractive index
D. Stock value
Radiocarbon is produced in the atmosphere as a result of
A. Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
B. Action of ultraviolet light from the sun on atmospheric oxygen.
C. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
D. Lightning discharge in atmosphere.
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A. Work done in rolling is more than in lifting.
B. Work done in lifting the stone is equal to rolling it.
C. Work done in both is same but the rate of doing work is less in rolling.
D. Work done in rolling a stone is less than in lifting it.
The absorption of ink by blotting paper involves:
A. Viscosity of ink
B. Capillary action phenomenon
C. Diffusion of ink through the blotting
D. Siphon action
Please explain