Recent content by PrakashPrasad

Thanks for the details and it helps me to clarify a lot but I have seen image formation concluded where two rays merge after converging - the third ray might not even converge at the same point : http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/image2.html#c2 Here you can see if we consider...

I get terribly confused to consider which rays for determining image formation via concave and convex lens? Many times examples take 3 rays into consideration - 1) A ray passing through Focus 2) A ray passing Optical Center (center of curvature) and 3)A ray parallel to principal focus. But the...

Thanks - I got your point - thanks for the lucid explanation and clearing my concept

Thanks - can you please explain me what information is missing - is my calculation to calculate the speed of sound is correct as mentioned in my main post?

I have a question to solve - A boy heard a sound of frequency 100 Hz at a distance of 500 m from the source of sound. What is the speed of sound? What is the time period of oscillating particles of the medium? I have approached the below way : We know that speed = distance / time...

Thanks for the details

Work expresses energy transmission or transformation of energy - got it thanks

Well is W = E ? I am not going by definition but rather its unit of measurement which in this case is Joule (for both Work & Energy)? So why we state that work is said to be done when a is force applied on a body and it displaces while energy is ability or capacity to do work - why are the unit...

Work unit is said to be Joule and Energy unit is also Joule. Work formulas in F x S ( Force x Displacement) . We know 1 J = 1 F x `1 s Now Energy is also measured in Joule(J) So can we state : E = 1 F x 1 s as 1 J = 1 F x 1 s that is E = W Then why work and energy are different by definition...

I am in need of an example of a body having large mass but low kinetic energy? Please let me some reason for same - is an elephant moving uphill an example of same

Can anyone please let me know an example where a body has large mass but low Kinetic Energy? Please provide some reasons for same.

As per the experiment if I have a ball filled with water and make holes in it in many places - now pressure exerted by water on the walls of the ball is same across the surface of the ball - now this is what confusing me - let us say that the height / depth of ball is h. So the pressure exerted...

I am reading pressure in liquids and at one point it states that Pressure of liquid at any point = Depth x Density of Liquid x g (gravity) But then it continues to state that Pressure is transmitted in liquid equally when I studied earlier that pressure in liquid increases with height then...

Does the amount of water displaced by an object needs to be greater than its weight (in air) for it to float in water? Say a bowl of 5 kg displaces 4 kg of water - will it float or sink? If it sinks the if it had displaced 5 kg of water would it float? That is the volume of water displaced by...

I have been studying that velocity = displacement / time. Now what if displacement / time always gives me same value - does it means that object is at rest as displacement is same then the body has not moved at all. So in above graph velocity is constant - ie displacement wrt to time is same...