Two groups of students were tested to compare their speed working math problems. each group was given the same problems. one group used calculators and the other group computed without calculators. what’s the hypothesis?

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size