Question
What is the difference between (in m2) the
area of a circular field of radius 14 metres and area of a rectangular piece of land having its dimensions as 20 metres × 15 metres?Solution
Area of the circular field = π × radius2 = (22/7) × 14 × 14 = 616 m2 Area of the rectangular piece of land = length × breadth = 20 × 15 = 300 m2 So, difference in area = 616 – 300 = 316 m2
What is the main effect of increasing the temperature of a gas at constant volume?
Energy that is produced commercially from coal is called –
Two charges, +3 µC and –3 µC, are placed 1 m apart in vacuum. What is the electrostatic potential energy of the system?
In the equation of motion (2as = v² - u²), (s) represents:
A pulse of light duration 10-5 s is absorbed fully by a little object initially at rest. If the power of this pulse is 45 × 10-3...
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For a projectile, maximum range is obtained when angle of projection is:
A particle with charge q = 2 μC moves through a magnetic field B = 0.5 T with velocity v = 4 m/s at angle 60°. Find magnitude of magnetic force.
Which of the following principle is used to produce low-temperatures'?
