Physics

The motion of a freely falling body is an example of uniformly accelerated motion.

1st copper wire: R = pl/A = pl/ πr2_x000D_ 2ndcopper wire: R’ = p’l’/A’ = pl/(4 πr2) = R/4_x000D_ If joined in parallel, (1/Req) = (1/R) + (1/R’)_x000D_ = 1/R + 4/R_x000D_ = 5/R_x000D_ Req = R/5

The part of the eye having the largest refractive index is lens.

An orbiting satellite is a projectile in the sense that the only force acting upon an orbiting satellite is the force of gravity. A satellite is acted upon by the force of gravity and this force does accelerate it towards the Earth. In the absence of gravity a satellite would move in a straight line path tangent to the Earth. In the absence of any forces whatsoever, an object in motion (such as a satellite) would continue in motion with the same speed and in the same direction. The force of gravity acts upon a high speed satellite to deviate its trajectory from a straight-line inertial path. Indeed, a satellite is accelerating towards the Earth due to the force of gravity. As far as spoon dropped by astronaut in a satellite is concerned, it continues to follow the motion of the satellite as there is inertia of motion acting upon it.