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A 0.2-lb model rocket is launched vertically from rest at time t = 0 with a constant thrust of 2 lb for one second and no thrust for t > 1 s. Neglecting air resistance and the decrease in mass of the rocket, determine
(a) The maximum height h reached by the rocket,
(b) The time required to reach this maximumheight.
solid steel shaft d 20mm is subjected to a torque of 1200nm. what size hollow circular steel shaft could be used to
a skydiver jumps from a ballon and falls freely for 6 seconds. her parachute then opens decelerating her at a constant
When a positron and an electron meet, they are both annihilated into pure energy. Calculate how much energy (in MeV) is released in this reaction assuming that each particle is moving at 50% the speed of light.
a 2250 l tank contains 5.682 kg of steam at 5 bar. determine the temperature and z compressibility of steam using a.
a 200 mm diameter sight window on the wall of a furnace is losing heat at a rate of 1500 w. if the furnace is at 1200
a car air conditioning system operates with r-134a in the peak summer outside at 100degf and inside desired at 77degf.
solar energy is used to warm a large collector plate. this energy in turn is transferred as heat to a fluid in a heat
Air at 1000K and 400 kPa enters the insulated nozzle of a turbo-jet engine. Because the plane is flying at an altitude, the exit pressure is only 80 kPa. Calculate the exit velocity of the nozzle if its isentropic efficiency is 93%. Report answer in ..
water steam at 3mpa and 400oc is expanded to 100kpa in an adiabatic turbine with an isentropic efficiency of 92.
a 1.4 kg aluminum household iron has 500 watt heating element. the surface area is 0.046 m2. the ambient temperatures
a modified brayton cycle is to be analyzed using the air-standard assumption with constant specific heats at a
a thermocouple is placed in an exhaust pipe in a diesel engine. thermocouple is reading 500oc while the exhaust pipe is
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