Valerie is preparing a blood sample for analysis. she wants to separate the solid red blood cells and obtain only the liquid portion, called plasma. the red blood cells are too small to filter out, but are denser than the plasma.
describe the steps valerie could take to separate the blood sample.

Which of the following statements are true of solids? a.the particles do not vibrate. b.the particles are in a fixed location. c.they have strong intermolecular forces between the atoms or molecules. d.the particles have less kinetic energy than those of liquids or gases.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

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