14. Describe the conditions that would cause us to see each of the three basic types of spectra. What do we see in the Sunâs spectrum shown on the opening page of this chapter? 18. Describe the Doppler Effect for light and what we can learn from it. What does it mean to say that radio waves are blueshifted? Why does the Doppler Effect widen the spectral lines of rotating objects? Test Your Understanding Each of the following statements makes some type of claim. Decide in each case whether the claim could be
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The hematocrit (Ht or HCT, British English spelling haematocrit), also known as packed cell volume (PCV) or erythrocyte volume fraction (EVF), is the volume percentage (%) of red blood cells in blood.It is normally 45% for men and 40% for women.nemia refers to an abnormally low hematocrit, as opposed to polycythemia, which refers to an abnormally high hematocrit. For a condition such as anemia that goes unnoticed, one way it can be diagnosed is by measuring the hematocrit levels in the blood. Both are potentially life-threatening disorders.