Ared blood cell typically carries an excess charge of about −2.5×10−12 c distributed uniformly over its surface. the red blood cells can be modeled as spheres approximately 7.6 μm in diameter and with a mass of 9.0×10−14 kg. how many excess electrons does a typical red blood cell have? excess electrons: 1.56 ×10 7 electrons does the mass of the extra electrons appreciably affect the mass of the cell? to find out, calculate the ratio of the mass of the extra electrons to the mass of the cell without the excess charge. ratio: 1.58 ×10 −10 what is the surface charge density on the red blood cell? express your answer in units of c/m2 and electrons/m2. surface change density: −3.44 ×10 3 c/m2 surface charge density: 2.15 ×10 22
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Physics, 22.06.2019 07:00
The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.
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Physics, 22.06.2019 18:30
Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?
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Physics, 22.06.2019 19:30
The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?
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Physics, 23.06.2019 03:30
First to answer will be the brainliest i need the answer asap
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Ared blood cell typically carries an excess charge of about −2.5×10−12 c distributed uniformly over...
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