Which lens is used for correcting long ?sightedness ?
A burn from steam is more painful than that from boiling water. Why ?
Is a sewing needle magnetic or non magnetic?
Define weight?
Explain the Sound ?
Explain why does sun appear flat during sunrise and sunset?
What should a drummer do to make the sound of lower pitch?
we know the speed of light...... then what is the speed of darkness?????????????
What is ion pair energy?
Why dies a man carrying a load on his back lean forward ?
What is meant by refraction of a wave?
What are the branches of physics?
Explain what is a positron?