Question
Two trains of equal lengths take 20 seconds and 30
seconds respectively to cross a telegraph post. If the length of each train be 240 metres, in what time will they cross each other travelling in opposite direction?Solution
Speed of the first train = [240/20] m/sec = 12 m/sec Speed of the second train = [240/30] m/sec = 8 m/sec Speed = (12 + 8) m/sec = 20 m/sec Required time = (240 + 240)/20 sec = 24 sec
Electrical fuse is used to interrupt excess of _________.
Which of the following statements best describes the relationship between static friction and the normal force?
Which Nobel Gas is also known as ‘Stranger Gas’?
The S.I. unit of the electric flux is
What type of image is always formed by a convex mirror?
The motion of a freely falling body is an example of ______________ accelerated motion.
Which of the following Instrument is used to measure humidity?
The Atom Bomb dropped in Nagasaki is an uncontrolled nuclear fission made up of:
The instrument which uses sound waves to measure the depth of oceans is –
Mercalli scale is the instrument used for measuring the intensity of ___________.
Relevant for Exams:
