Agolf ball is hit off a tee at the edge of a cliff. its x and y coordinates as functions of time are given by x 5 18.0t and y 5 4.00t 2 4.90t2, where x and y are in meters and t is in seconds. (a) write a vector expression for the ball's position as a function of time, using the unit vectors i^ and j^. by taking derivatives, obtain expressions for (b) the velocity vector vs as a function of time and (c) the acceleration vector as as a function of time. (d) next use unit-vector notation to write expressions for the position, the velocity, and the acceleration of the golf ball at t 5 3.00 s.
Answers: 1
Physics, 22.06.2019 02:50
Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)
Answers: 3
Physics, 22.06.2019 14:30
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Physics, 22.06.2019 21:30
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Physics, 22.06.2019 23:30
Aball of mass 0.3kg is released from rest at a height of 8m.how fast is it going when it hits the ground? accleration due to gravity is g=9.8m/s
Answers: 2
Agolf ball is hit off a tee at the edge of a cliff. its x and y coordinates as functions of time are...
Mathematics, 25.07.2020 22:01
Mathematics, 25.07.2020 22:01
Mathematics, 25.07.2020 22:01
Mathematics, 25.07.2020 22:01