A bird in air is dividing vertically over a tank with speed `6 cm//s`. The base of the tank is silvered. The fish in the tank is rising upward along the same line with speed `4 cm//s`. (Take: `mu_("water") = 4//3)`. Find:
(a) The speed of the image of the fish asseen directly by the bird.
(b) The speed of the image of the bird relative to the fish looking upwards.

A bird in air is diving vertically over a tank with speed 5 "cm//s" , base of tank is silvered. A fish in the tank is rising upward abong the same line with speed 2cm/s. Water level is falling at rate of 2cm/s [Take : mu_(water) = 4//3 ] {:("Column"I(cm//s), "Column"II), ((A) "Speed of the image of fish as seen by the bird directly", (P) 8), ((B) "Speed of the image of fish formed after reflection in the mirror as seen by the bird", (Q) 6), ((C) "Speed of image of bird relative to the fish looking upwards" , (R) 3), ((D) "Speed of image of bird relative to the fish looking downwards in the mirror" , (S) 4):}

A man runs towards a mirrorr at a speed 15m//s. The speed of the image relative to the man is

Find out the following in the figure shown below : (a) The apparent speed of the fish as observed by the bird (b) The apparent speed of the bird as observed by the fish

Falcon is a bird which flies with a maximum speed of 320 km//h . Calculate its speed in m//s .

The speed of the effux from an open tank is identical to that of "_____"

A bird is flying 3m above the surface of water,If the bird is diving vertically down with speed =6m//s his apparent velocity as seen by a stationary fish underwater is:

A bird in air looks at a fish vertically below it and inside water. h_(1) is the height of the bird above the surface of water and h_(2) , the depth of the fish below the surface of water. If refractive index of water with respect to air be mu , then the distance of the fish as observed by the bird is