An earth satellite moves in a circular orbit 561 km above earth's surface with a period of 95.68 min. what are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

In which of the following is positive work done by a person on a suitcase

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?