For a system to transmit thousands of telephones conversations, several television programs and numerous data signals, it need the following number so threads of optical fibre
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 particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of particle.the motion of the particle takes place in a horizontal plane.It follows
A train us moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction The relative velocity of train with respect to car is
How many fringes will pass a reference point if the moveable mirror of a Michelson s interferometer is moved 0.06 mm The wavelength of light used is 5.89 x10-3 mm
In Michelsion's interferometer, if a dark fringe is seen in the beginning, the next dark fringe will appear by moving the moveable mirror through a distance
Rise in vapour pressure of water from 30 to 60°C is only 32 torr to 149.4 torr (117.4 torr) but from 60 to 90°C is 149.4 to 527.8 torr (378.4 torr).it is due to
The rate of diffusion of hydrogen gas is three times than that of an unknown gas at same temperature and pressure than the molar mass of unknown gas is
Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle
Surface and ground water sources are contaminate by various human activity. which of the following is not a human activity that causes contamination in fresh water?
The value of van der Waal s constant a for gases CO2, N2, and SO2, are 3.59 ,1.39, 1.36, and 6.17 atm dm6 mol-2 respectively the gas which can be most easily liquefied is
Metabolically dormant bodies produced at a later stage of bacterial cell growth that germinate under favourable conditions to form vegetative cells are called
Triploblastic, unsegmented, acoelomates exhibiting bilateral symmetry and reproducing both asexually and sexually, with some parasitic forms are included in
In Japanese art, profound emotion is frequently couched in images of nature, observed with ______ conditioned by life in a land of dramatic seasonal change, where perils of earthquake and typhoon make nature's bounty ______ and its processes awesome and beautiful
The director of the Miss America pageant continues to maintain that the judges ultimate choice is based less on the physical appearance of the contestant as on her intelligence talent and personality
Jockeys at most racetracks become familiar with the horses by riding them in early morning workouts which keeps both the jockeys and the horses in good condition
Long popular among the connoisseurs of indian music Ravi Shankar first impressed western listeners with his phenomenal technical virtuosity but they soon came to appreciate his music as an artful expression of an older cultures musical insights
