A particle is moving along a circular path of radius 5 m with uniform speed 5 m/sec what will be the magnitude of centripetal acceleration when the particle completes half revolution
A two-slit arrangement is set up to produce an interference pattern on a screen. The fringes are too close together for convenient observation. How could the distance between them be increased?
An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m.When it is vertically above a point A on the ground a bomb is released from it.The bomb strikes the ground at point B.The distance AB is
A box of mass 2 kg is at rest on top of a 0.75m high table. The weight of the object is 19.6 N. if the object is moved so that it falls to the ground, what will be the weight of the object after it has fallen 0.1 metre distance?
A uniform beam of weight 100 N is 4 m long and is supported 1.0 m from one end. A load of weight wN hangs from that ened and the beam is in equilibrium.What is the value of w?
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
The force exerted by the fluid in a hydraulic pump on the piston is 2000 N.If the area of the piston is 10 cm2 the fluid pressure on the piston is in N/cm2
Ratio of moment of inertia of two objects A and B is 2:3 which of the following is the ratio of torques of A and B respectively. If both are being rotated with constant angular acceleration
In many countries plastic waste is collected separetaly and sorted.Some of this is incinerated to provide heat for power stations. Why is pvc polyvinylchloride,removed from any waste that is to be incinerated?
H2O and HF are the hydrides of the second period. Fluorine is more electronegative than oxygen. Anyhow, the boiling point of water is greater than that of HF. This is due to:
A student put two eggs A and B in HCL solution, After five minutes he took them out for weighing but egg dropped in water accidentally. The student was able to take it out after 30 minutes, He weighed it, Its weight was 40.33g. Weight of egg B was also 40.33g. Teacher told him that if both eggs have been dropped in water, the weight of egg B would have been:
.Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms?
Methyl mercaptan, CH3SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline. What will be formed when CH3SH is burned in an excess of air?
The rate of reaction between A and B increases by a factor of 100, when the concentration of A is increased 10 folds, the order of reaction with respect to A is
The reduction potentials of non-metals are A =+0.54V, B=+1.08V, C=+1.36V. D= +2.87V Which non -metal can displace all other from aqucous solution of their salts
Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that cause contamination of fresh water?
According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0°C if the temperature of the gas is changed by
Glendon providers a dark underside to Frederick Jackson Turner's frontier thesis that saw rugged individualism as the essence of American society ______ an individualism that she sees as ______ atomism
Having discovered the Roman aristocrats to be suffering from lead poisoning it is now thought that this was a major cause of their inability to reproduce
Because Inspector Mumtaz could not contain his scorn for the police commissioner, he was imprudent enough to make ______ remarks about his superior officer
