Question Answers

A fish F is still under water at a depth d = 8 m. A bird is diving along line PQ at a constant velocity in air. When the bird is exactly above the fish, the fish observes it at a height of 40 m from itself and A fish F is still under water [...]

A pencil (PQ ) of length 20 cm is moving along the principal axis of a concave mirror M, with a velocity 6 m/s approaching the mirror of focal length 20 cm . The mirror itself is moving away from the pencil A pencil (PQ ) of length 20 cm is moving along the principal [...]

Two concave mirrors each of focal length 20 cm are placed such that their principal axes are parallel to each other and at a distance of 1 cm to each other. Both the mirrors are at a distance of 100 cm to each other. A = 4 Two thin prisms are combined to form an [...]

A bomber plane moves horizontally with a speed of 600 m/s and a bomb released from it, strikes the ground in 10 s. The angle with horizontal at which it strikes the ground will be A bomber plane moves horizontally with a speed of 600 m/s and a bomb released from it strikes the ground [...]

Choose the correct statement – a) the speed of the projectile at its maximum height is half its initial speed. Angle of projection is 60 degree. b) a missile is fired for maximum range with an initial velocity of 20 m/s, the range of the missile is 40 m then Two Projectiles A And B [...]

Match the following – Column 1 : Angle of projection a 45, b) 60, c) 30, d) tan -1 4 Column 2 b) 60 c) 30 d) tan -1 4 Column 2 Match the following - Column 1 : Angle of projection a 45 September 8, 2020 Category: Cengage NEET by C.P Singh , Chapter [...]

AB and CD are surfaces of two slabs as shown in figure. The medium between the slabs has refractive index 2. Refractive index of the slab above AB is root 2 and below CD is root 3. Find the minimum angle of A = 4 Two thin prisms are combined to form an achromatic combination. [...]

Match the columns Match the columns September 8, 2020 Category: Cengage NEET by C.P Singh , Chapter 4 - Motion in a Plane , Part 1 ,

Consider the situation sketched. A fish lies 40 cm under the surface of water (mu water = 4/3), 80 cm above a concave spherical mirror whose radius of curvature is 120 cm. An observer looking down 80 cm above a concave spherical mirror whose radius of curvature is 120 cm. An observer looking down Consider [...]

It was calculated that a shell when fired from a gun with a certain velocity and at an angle of elevation 365π​rad should strike a given target in the same horizontal plane. In actual practice, it was found that a hill just prevented the trajectory. At what angle of elevation should the gun be fired [...]