# How to get A in physics?

Nischal Singh Dangol Asked: How to get A in physics? Answer: Whatever the syllabus or course, an A grade means "Excellent work indicating a clear mastery of the subject material" This requires evidently a basic understanding of the subject, thorough with the fundamentals and the ability to apply the principles to solve problems creatively. One … Continue reading How to get A in physics?

# Wave travelling from one medium to another

Iqbal Lucky asked "when a wave enters from air to water, its wavelength changes but frequency remains unchanged. why" Answer Velocity of a wave = frequency x time period V = ν λ When a wave travels from one medium to another, its velocity changes and so also is its wavelength, but frequency; which is … Continue reading Wave travelling from one medium to another

# Physical Quantity

Prabesh wants to know more on Physical quantities: Physical Quantity is a quantity which can be measured. eg; length, mass, force, time etc (The quantities which cannot be measured are abstract. Eg; Love, anger intelligence)

# Limitations of Dimensional Analysis

Ashmeeta Bhattarai asked: "What are limitations of principle of homogeneity of dimensional analysis?" The dimensional analysis has the following limitations It fails while using it to derive a relation among physical quantities, if there are more than 3 unknown variables on which a given physical quantity depends It does not tell whether a given Physical … Continue reading Limitations of Dimensional Analysis

# Rain and Man problems – How to solve?

Shashank Asked: "How to solve rain and man problems from motion in one dimension?" Answer: The problem is solved using principles of vector addition. There is a simple logic to remember A/C = A/B x B/C If we represent diagrammatically (in the form of vectors) the velocity of rain wrt ground, velocity of man wrt … Continue reading Rain and Man problems – How to solve?

# Principle of Homogenity of Dimensions

Binay Sharma asked: "Explain the applications of the Principle of homogenity of Dimensions and its importance" Principle of homogenity of dimensions states that "For an equation to be dimansionally correct, the dimensions of each term on LHS must be equal to the dimensions of each term on RHS." Applications 1. To determine the dimensions of … Continue reading Principle of Homogenity of Dimensions