What is the dimensional formula of epsilon not?
The dimensional formula of Permittivity of free space or vacuum is given by, ϵo = M-1 L-3 T4 I2 where, M... View Article
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A bus accelerates uniformly from 54 km per hour to 72 km per hour in 10 seconds. Calculate the distance covered by the bus in metres during interval and also find the acceleration in metre per second square.
Given, Initial velocity, u = 72 km/h = 72 (5/18) m/s = 20 m/s Final velocity, v = 54 km/h... View Article
Give one example where heat energy can be converted to other forms of energy.
The examples of conversion of heat energy into other forms of energy are: Sun light converted into solar energy Heat... View Article
Cooking vessels should be made of ______ conductors.
Cooking vessels should be made of heat conductors, which are metals, but the handles should be insulated to avoid burns.... View Article
Can you suggest one more example in your daily life that uses the principle of expansion of solids?
The example we can observe in daily life is: due to heating the cracks of the roads expands or the... View Article
Railway tracks are constructed with gaps in the rails to allow the metal rails to ________ due to the heat of summer and the heat generated by ________.
Railway tracks are constructed with gaps in the rails to allow the metal rails to allow expansion of rails, due... View Article
Heat flows from a region of __________ temperature to a region of ______temperature.
Heat flows from a region of higher temperature to a region of lower temperature. Learn more: Introduction to Heat
Matter in all forms -solids , liquids or gas- ___________ in heating.
Matter in all forms, solids , liquids or gas, expand on heating. Learn more: Introduction to Heat
Heat energy is also called as __________ energy.
Answer: Heat energy is also called thermal energy. Heat energy Heat is defined as the flow of energy from a... View Article
Heat is a form of _________ .
Heat is a form of Energy. Learn more: Introduction to Heat
Explain optical centre of a lens with the help of proper diagrams.
Optical centre is a point on the principal axis of the lens such that a ray of light passing through... View Article
What is lateral pressure?
Lateral pressure is the pressure excerted in the horizontal direction or lateral direction by a substance
Light year is the unit of following physical quantity: (a) Time (b) Distance (c) Mass (d) None
Light year is a unit of distance. Hence the correct answer is option (b)
Express unified atomic mass unit in kg
unified atomic mass unit amu = 1/12 the mass of one carbon (C12) atom. By Avogadro’s number 6.023 x 1023... View Article
Why the focal length of convex lens is always positive?
A convex lens is a converging lens. In a convex lens, the rays of light traveling parallel to the principal axis actually... View Article
A battery of emf 10 v and internal resistance 3 omega is connected to a resistor. The current in the circuit is 0.5A. The terminal voltage of the battery when the circuit is closed is?
Given, EMF of battery=10v Internal rssitance of battery, r=3 ohms Current in the circuit, I=0.5A Resistanc of the resistor=R By... View Article
The boiling point of water in kelvin scale is?
The boiling point of water on the Kelvin scale is 373.2K. Each division in the kelvin scale called a kelvin... View Article
Give two examples for each for the following motions: (i) Linear motion (ii) Spinning motion (iii) Oscillatory motion (iv) Periodic motion (v) Vibrational motion (vi) Circular motion (vii) Random motion
The examples are: (i) Linear motion :Motion of train on railway track, Motion of football on ground surface (ii) Spinning... View Article
The rate of change of displacement with time is called (a) speed (b) velocity (c) acceleration (d) retardation.
Answer: (b) velocity
1. One dozen means how many items? 2. One gross means how many items?
1. One dozen is equal to 12 items 2. One gross is equal to 144 items
