Physics, 11.02.2021 07:30 wshemekia3oyliv4
A 75-m m -long train begins uniform acceleration from rest. The front of the train has a speed of 18 m/s m / s when it passes a railway worker who is standing 120 m m from where the front of the train started (see the figure below). What will be the speed of the last car as it passes the worker?
Answers: 3
Physics, 22.06.2019 07:50
The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
Answers: 2
Physics, 22.06.2019 10:00
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Physics, 22.06.2019 16:40
Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward
Answers: 1
A 75-m m -long train begins uniform acceleration from rest. The front of the train has a speed of 18...
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