Physics, 21.12.2019 04:31, dvandebrake2002
Aprojectile of mass m is fired straight upward from the surface of an airless planet of radius r and mass m with an initial speed equal to the escape speed vesc (meaning the projectile will just barely escape the planet's gravity -- it will asymptotically approach infinite distance and zero speed.) what is the correct expression for the projectile's kinetic energy when it is a distance 9r from the planet's center (8r from the surface). ignore the gravity of the sun and other astronomical bodies. ke (at r = 9r) is: a. gmm/9rb. gmm/8rc. 1/2mvesc^2d. -gmm/8re. none of these
Answers: 2
Physics, 23.06.2019 02:40, jarteria0
Check the following equation for dimensional homogeneity: ⅆ mv=∫t1t2(fcosθ)ⅆt where m is mass, v is velocity, f is force, θ is an angle, and t is time. check that each term in the equation has the following dimensions: [malbec] where you are to choose the coefficients a, b, c.
Answers: 2
Physics, 23.06.2019 08:30, keasiabrown25
Acertain half-reaction has a standard reduction potential e_red^0 = -0.94 v. an engineer proposes using this half-reaction at the cathode of a galvanic cell that e must provide at least 1.00 v of electrical power. the cell will operate under standard conditions. a. is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? b. is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have?
Answers: 1
Aprojectile of mass m is fired straight upward from the surface of an airless planet of radius r and...
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