Speed of train = 1200/20 = 60 m/sec Let the speed of the man be ‘s’ m/sec Relative speed of the train = (60 – s) m/sec According to the question, (60 – s) = 1200/30 Or, s = 60 – 40 = 20 Therefore, speed of the man = 20 m/sec
A ray of light is incident on a transparent medium at an angle of 60°. The reflected ray of light is found to be completely Q.4 polarized. Then, the r...
Tape recorder should not be kept near one of the following things –
The polarization of electromagnetic waves demonstrates that they are:
Smog is a combination of –
Which type of mirror is used in car headlights?
What term refers to the superposition of two or more coherent waves to produce regions of maxima and minima?
An ant can see objects all around it due to the presence of which type of eyes?
Which law states that the total current entering a junction is equal to the total current leaving the junction?
The wave nature of matter was proposed by:
What is the rate of change of momentum called?
