Answers: 3
Physics, 21.06.2019 22:20
Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage
Answers: 2
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
is the increase in density of a medium due to wave travel....
Mathematics, 28.05.2020 15:57
Physics, 28.05.2020 15:57
Mathematics, 28.05.2020 15:57
Chemistry, 28.05.2020 15:57
Geography, 28.05.2020 15:57
Physics, 28.05.2020 15:57
Mathematics, 28.05.2020 15:57
English, 28.05.2020 15:57
English, 28.05.2020 15:57
English, 28.05.2020 15:57
Mathematics, 28.05.2020 15:57