Question
Calculate the speed of a train in meters per second if
it covers a distance of 20 kilometers in 12 minutes.Solution
Speed of train in km/hr = 20/12 x 60 = 100 km/hr or, speed of train in m/sec = 100 x 5/18 = 250/9 = 27(7/9) m/secÂ
The half-life of a radioactive substance is 10 days. The time in which only 1/8th of the original substance remains is:
An image formed by a plane mirror is ______.
From the given options, the speed of sound is highest in which material?
Which law states that the total current entering a junction is equal to the total current leaving the junction?
What type of radiation is produced by a hot object emitting energy? Â
Which instrument is primarily used to measure the relative density of liquids by utilizing the principle of buoyancy?
A 220 V, 100 W bulb is connected to a 110 V source. Calculate the power consumed by the bulb
The electric and magnetic fields of an electromagnetic wave are _____________
Two charges, +3 µC and –3 µC, are placed 1 m apart in vacuum. What is the electrostatic potential energy of the system?
Two wires made of the same material have lengths in the ratio 1:2 and diameters in the ratio 2:1. If the same force is applied to both, what is the rat...
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