Ms. Robinson slides a piñata across the floor. The piñata has a mass of 2.4 kg and the coefficient of friction between the floor and the piñata is 0.62. What is the minimum force needed to get the piñata moving?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

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?