Ared blood cell typically carries an excess charge of about β2.5Γ10β12 c distributed uniformly over its surface. the red blood cells can be modeled as spheres approximately 7.6 ΞΌm in diameter and with a mass of 9.0Γ10β14 kg. how many excess electrons does a typical red blood cell have? excess electrons: 1.56 Γ10 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 Γ10 β10 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: β3.44 Γ10 3 c/m2 surface charge density: 2.15 Γ10 22
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Physics, 22.06.2019 00:30
Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs
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Physics, 22.06.2019 10:30
The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.
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Physics, 22.06.2019 20:20
The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 β t2)k (iv) r (t) = 2t j + (50 β t2)k (v) r (t) = (50 β 2t) i + 2t j + (50 β t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?
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Ared blood cell typically carries an excess charge of about β2.5Γ10β12 c distributed uniformly over...
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