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 sonar depth finder in a boat uses sound signals to determine the depth of water. Fourseconds after the sound leaves the boat it returns to the boat because of reflection fromthe bottom. Assume the speed of sound in water is 1,460 meters per second. The depth of the water is, in meters, :
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 tank containing water has an orifice in one vertical side. If the centre of the orifice is 10 m below the surface level in tank, then velocity of efflux is
A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h.The force required to stop the vehicle in 10s force required to stop the vehicle in 10s is:
In a experiment to determine acceleration due to gravity by simple pendulum a student commits 1 % positive error in the measurement of length and 3 % negative error in the measurement of time period The percentage error in the values of g will be
The spectrum of a star’s light is measured and the wavelength of one of the lines as thesodium’s line is found
to be 589 nm. The same line has the wavelength of 497 nm whenobserved in the laboratory. This means the
star is
A body falls freely from rest.It covers as much distance in the last second of its motion as covered in the first three seconds.The body has fallen for a time of
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
Hydrolysis of protein by 6M HCl gives peptides and then alpha-amino acids. How many alpha-amino acids molecules are obtained on the hydrolysis of a tetrapeptide
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
Lipids are naturally occurring compounds produced in cell and are water insoluble but soluble in organic solvent one of the following is not a lipid, Select among the following:
PCI5 (g) <---------> PCl3 (g) +Cl2 (g) in a closed container at equilibrium. At a fixed temperature, what will be the effect of adding more PCl5 on the equilibrium constant
