Can you answer these? A bullet of mass m is fired with a velocity v and strikes a a block of mass M suspended by a string of length L. the bullet gets embedded in the block. What is the angle the the block makes due to the impact?   Why planets revolve around their … Continue reading Questions waiting to be answered at www.askphysics.com

# Where is electricity stored after it is generated but before it is supplied?

This question was posted by Chithraja. This is a common doubt arising naturally in the minds of children as well as adults who think. But they never ask, or if they ask the questions remain unanswered. I will explain the question itself first. When we switch on a bulb we get the energy. But what happens to the electricity [...]

# KERALA PLUS TWO PHYSICS SAMPLE QUESTION PAPER

The following links to SCERT will help you get a handful of good sample papers for preparation for Plustwo Physics Exams including the Onam Examinations Class X Physics Sample Paper (SSLC) 2006 Sample Question Paper on Electronics   Higher Secondary Physics Question Paper

# Question from Relative velocity

The distance between two cars decrease by 20m in 2s when they travel in opposite direction , and distance decrease by 1m in 1s when they travel in same direction. the speeds of cars are ………. ? (Divya posted this question)

# Define Momentum

Momentum is defined as the quantity of motion. Only moving bodies possess momentum. It is a vector quantity and its direction is same as that of velocity. Momentum is measured as the product of mass and velocity. Momentum of a body is a measure of the ...

# A question from Relativity

Can someone tell me how to derive M = M_0/√(1 – v^2/c^2) Emmanuel Gonzalez posted this. The formula for relativistic mass (i.e. the mass of a body when it is moving with speeds comparable to the velovity of light in vacuum is given by)

# A Question on Evaporation

Arunabh Arun sent this problem. (Click on the image to see the enlarged version.)