13.RAHUL GRANDFATHER USED A LENS WITH HANDLE TO READ NEWSPAPER ? WHICH TYPE OF LENS IS FITTED IN THAT HANDLE AND WHAT IS THE PURPOSE OF USING IT

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?