A non-uniform beam of weight 50 N is 2 m long and is supported on a pivot situated in the exact middle of the beam. The centre of gravity of the beam is 0.5 m ot the right of the point where the pivot touches the beam. What weight has to be added to the left side of the beam so that the beam stays perfectly balanced (in equilibrium)?
A liquid flows through a pipe of non-uniform cross-section. If A1 and A2 are the cross-section of the portions of the pipe at two points the ratio of velocities of liquid at these points will be
By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second (g = 10 m/s2).
The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and
pressure is reduced to half then half-life of the same element will be:
If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre,then the potential at a point distance 15 cm from the centre will be
If g is the acceleration due to gravity on the surface of the earth, then the value of the acceleration due to gravity at height equal to R/2 from the surface of earth is (R is the radius of the earth)
The kinetic energy acquired by a mass m in traveling a certain distance d.starting from rest. under the action of a constant force is directly proportional to
A projectile is thrown at an angle of 30° with horizontal with a velocity of 980 m sec-1. The time of flight to reach the highest point of its trajectory is:
The emf of a cell of negligible internal resistance is 2V. It is connected to the series
combination of 𝟐𝛀, 𝟑𝛀 𝐚𝐧𝐝 𝟓𝛀 resistance. The potential difference across 𝟑𝛀 resistance will be
in volt:
