Speed of the train = 72 kmph i.e., 72 × 5/18 = 20m/s So, total distance cover in 20 seconds = 20 × 20 = 400m Speed of Car = 36kmph i.e, 36 × 5/18 = 10m/s Relative speed of Car and Train in Opposite direction = 20 + 10 = 30 m/s So, Distance cover in 6.5 seconds = Length of the train = 30 × 6.5 = 195m Hence, Length of the Platform = 400 – 195 = 205m
The material which can be deformed permanently by heat and pressure is called a:
Rain drops acquire spherical shape due to -
If radius of earth is R then the height ‘h’ at which the value of ‘g’ becomes one-fourth is-
The wave nature of matter was proposed by:
A battery of emf 12 V and internal resistance 4 ohm is connected to a resistor. If the current in the circuit is 0.6 A, what is the resistance of the re...
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)
Which of the following phenomena establishes the transverse nature of light waves?
What do we call sound waves with frequencies below 20 Hz?
Newton’s second law of motion primarily explains which of the following?
