Field Theory Answers

PRINCIPLE OF optical fiberr in hindi virsion

1.A space vehicle is in orbit around a planet and moving in a clock wise fashion. If the vehicle wants to move to a lower orbit, should the first rocket that fires aim to decelerate or accelerate the vehicle, and similarly, what should the second firing of the rockets aim to do?
2. If a space vehicle re-enter Earth's atmosphere at too shallow an angle, what will happen to the vehicle and why?
3.In using the gravitational field of a planet to propel a vehicle farther into space, what two important quantities are conserved?
4.What is it about the position of the three antennae in NASA's Deep Space Network (DSN) that allows Earth-based observers to keep in contact with vehicles deep in space?

what is the value of the intensity of the gravity and how do you compare it, to the known value ?
how do you calculate the intensity of the gravity when you have data?
and what could be the possible errors in this laboratory

how to find the value of the intensity of the gravity and how does it compare to the value that is known ? pls help me i need this for tommorow

Explain the working of synchrocyclotron in your own words