Sharks due to their special organs, the "ampulae of lorenzini due to which they can detect the potential difference and can locate their prey very precisely of the order of
A listener observes the frequency “f” of stationary source. If it move toward with 3
times of velocity of sound. Then the apparent frequency of the sound will be
On the ground the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50,where R is the radius of the Earth
A progressive sound wave is a means of transferring energy. A progressive sound waveof constant frequency is generated in air. The intensity of energy transfer is directlyproportional to another of the wave parameters. Which of the following is correct?
A copper ball of radius r is moving with a uniform velocity v in the oil. The dragging force acting on the ball is F. The dragging force on the copper ball of radius 2r moving with uniform velocity 2v in the oil is
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
If source and observer are moving towards each other with same speed and aftercrossing they are
receding each other then frequency observed by observer:
