If Earth orbited the Sun at the distance of Jupiter, the diameter of its orbit would be about five times greater than its actual value. Would this larger orbit affect the size of the parallactic angle measured for a given star

What are the applications of electromagnetic waves

What is the coefficient of kinetic friction μk between the block and the tabletop?

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?