Question
A train running with a speed of 153 km/hr can cross a
pole in 13 seconds and a platform in 17 seconds. Find the length of the platform.Solution
Speed of the train = 153 × (5/18) = 42.5 m/sec Length of the train = 42.5 × 13 = 552.5 metres Let the length of the platform be ‘x’ metres Therefore, 552.5 + x = 42.5 × 17 Or, x = 722.5 – 552.5 = 170 metres
__________ is the same at every point on a rotating body.
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...
A 220 V, 100 W bulb is connected to a 110 V source. Calculate the power consumed by the bulb
During ______ motion of an object along a straight line, the change in velocity of the object for any time interval is zero.
Which of the following gas is used in the manufacture of Vanaspati Ghee?Â
What type of lens is used to correct myopia (nearsightedness)?
What is the acceleration due to gravity on the Moon? Â
Light from a point source in air falls on a spherical glass surface (n=1.5 c and radius of curvature = 10 cm). The distance of the light source from the...
Two charges, +3 µC and –3 µC, are placed 1 m apart in vacuum. What is the electrostatic potential energy of the system?
The pitch of a sound is primarily determined by which of the following?
Relevant for Exams:
