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A 200 kg lander is approaching Mars. Assume a gravitational acceleration of 3.7 m/s^2. At the illustrated instant, h= 15 m and v = 2.5 m/s. What is the average thrust needed to land with a touchdown speed of 0.5m/s after 10 s?
air at 80 degrees fahrenheit and 80 percent relative humidity is cooled to 51 degrees fahrenheit at a constant pressure
crates a and b weigh 100 lb and 50 lb respectively. if they start from rest determine the their speed when t 5s. also
calculate the work required to compress air from standard atmosphereic pressure to 2.3 atm in kjkg air.a. assume a
the system is released from rest with the cable taut. neglect the small mass and friction of the pulley and calculate
an aircraft cooling system bleeds air from the engine compressor at 300 kpa and 200 c at the rate 0.09 kgs. the air is
a 3 m x 3 m x 2.4 m room losses heat through the walls at a rate of 520 w. determine the final temperature of the room
a particle moves along a straight line with an acceleration of a 53s13 s52ms2 where s is in meters. determine the
conventional ceramics have a fracture toughness of about 5 while advanced ceramics may have 20. determine1 how larger
what size unf bolt made from sae grade 5 steel is needed to carry a static tensile load of 3000lb with a safety factor
a vapor compression refrigetarion cycle has a theoretical cop of 4.8 and provides 120000 btuh of cooling. the
a simple steam power plant operates on 20 kgs of steam. heat transfer to the steam in the boiler is 69 mw and heat
If the filling is done rapidly, calculate the final temperature in the small cylinder, (a) assume that oxygen is an ideal gas with Cv= 5R/2 and (b) using accurate thermodynamic data for oxygen.
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