Question
How many seconds will a train 60 m in length, travelling
at the rate of 40 km an hour, take to pass another train 90 m long, proceeding in the same direction at the rate of 28 km an hour?Solution
Relative speed = 40 – 28 = 12 km/hr Speed (m/sec) = 12 × (5/18) = 10/3 m/sec Time = Total length of both the trains/Relative speed => Time = (90 + 60)/(10/3) = 45 sec
What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
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.
What does Ohm's Law state? Â
The reason for a swimming pool to appear less deep than the actual depth is –
A person throws a ball from ground level at speed u and angle θ. The ball reaches maximum height H and range R. What is the ratio H/R?
Which gate gives a high output only when both inputs are low?
The apparent weight of a person in a lift moving downward with uniform acceleration is:Â
An object is placed 10 cm from a convex mirror of focal length 15 cm. Find the position of the image.
Which property of a wave is related to its frequency? Â
The mass density of Kerosene is:
