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Speed of train = (Length of train + Length of Platform)/Required time Length of train = 400 m Crossing time of platform = 2 × 60 = 120 sec Length of platform = 400 × 2 = 800 m Let the speed of train be x. Speed of train = (400 + 800)/120 ⇒ x = 1200/120 = 10 m/s
The movement of a train is an example of what type of motion?
Which law states that the ratio of the potential difference across a conductor to the current through it is constant, provided the temperature remains c...
Which of the following decays does not change the atomic number of the nucleus?
A uranium nucleus undergoes fission and releases 200 MeV per event. If 1 gram undergoes complete fission, the energy released in kWh is:
Half-life of a radioactive substance is 10 days. The time after which only 1/16th of it remains is:
The refractive index of glass is 1.5. What is the speed of light in glass?
(Speed of light in vacuum is 3.0 ×108 m s-1)
A soap bubble shows colours when illuminated with white light. This is due to –
Why do brads not have respiratory trouble at the time of flying at high all?
The group velocity of matter waves associated with a moving particle is:
The colour of sky appears blue due to –
