What does it mean to have parfocal objectives? a) The whole sample is in focus
b) Focusing on the sample is done automatically
C) The sample remains in focus when the stage is moved laterally
d) The sample remains in focus when the objectives are changed.

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass