1. How fast does an object need to travel to stay in orbit for one second? 2. How fast does an object need to travel to stay in orbit for two seconds?
3. How fast does an object need to travel to stay in orbit for three seconds?
4. You may have noticed that the object needs to keep going faster and faster to stay in orbit. What is the average acceleration needed for the object to stay in orbit from 1–3 seconds?
5. In the real world, orbiting objects such as satellites do not need to be constantly accelerating. What is different about real-world satellites and the theoretical satellites?

Research the neutrino using the internet and report your findings. in a nuclear decay, the nucleus of an atom splits apart. larger particles can be detected and their masses and velocities can be recorded. explain how the existence and properties of the neutrino could be predicted using the conservation laws.

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.