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
Suppose the water flows out from a pipe at 3 kg s-1and its velocity changes from 5m s-1to zero on striking the wall, the force exerted by water on wall will be
What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value the mass remaining constant?
The two vectors to be combined have magnitude 60 N and 35 N. Pick the correct answer from those given below and tell why is it the only one of the three that is correct.
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:
A snooker ball moving with velocity v collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is
Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the smaller forces and the magnitude of resultant is 12.Then the magnitude of the forces are
A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h.The average speed of the car is
The uranium Nucleus 𝟐𝟑𝟖 𝑼 undergoes successive decays, emitting respectively 𝑎 − 𝒓𝒂𝒚,𝖰 −
𝒓𝒂𝒚 𝒂𝒏𝒅 − 𝒓𝒂𝒚𝒔. What is the atomic number and atomic mass of the resulting nucleus:
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
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
One of the followings sis used in genetic/molecular biology research because of rapid generation and rapidly increasing pool of genetic and biochemical information
The president of the block association tried to convince her neighbours they should join forces to prevent crime in the neighbour hood rather than continuing to be victimized
Unlike Edgar Allan Poe whose works were ignored in his native country the works of Hawthorne were read and appreciated by the public and by contemporary critics
The revelation that shakespeare wrote certain of his plays expressly for queen elizabeth i lends credence to the theory that the dark lady of the sonnets was not shakespeares mistress nor any other woman the playwright had romanced but in fact the queen herself
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
