Suppose you are navigating a spacecraft far from other objects. the mass of the spacecraft is 2.5 × 104 kg (about 25 tons). the rocket engines are shut off, and you're coasting along with a constant velocity of < 0, 20, 0> km/s. as you pass the location < 6, 7, 0> km you briefly fire side thruster rockets, so that your spacecraft experiences a net force of < 3 × 105, 0, 0> n for 24.5 s. the ejected gases have a mass that is small compared to the mass of the spacecraft. you then continue coasting with the rocket engines turned off. where are you an hour later? (think about what approximations or simplifying assumptions you made in your analysis. also think about the choice of system: what are the surroundings that exert external forces on your system? )
Answers: 2
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
Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?
Answers: 3
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
Suppose you are navigating a spacecraft far from other objects. the mass of the spacecraft is 2.5 ×...
Health, 19.10.2019 06:30
Social Studies, 19.10.2019 06:30
Mathematics, 19.10.2019 06:30
Mathematics, 19.10.2019 06:30
Biology, 19.10.2019 06:30
History, 19.10.2019 06:30
English, 19.10.2019 06:30
Mathematics, 19.10.2019 06:30
Chemistry, 19.10.2019 06:30
Mathematics, 19.10.2019 06:30
Social Studies, 19.10.2019 06:30