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A jet-propelled airplane with a mass of 10 Mg is flying horizontally at a constant speed of 1000 km/h under the action of the engine thrust T and the equal and opposite air resistance R. The pilot ignites two rocket-assist units, each of which develops a forward thrust T0 of 8 kN for 9 s. If the velocity of the airplane in its horizontal flight is 1050 km/h at the end of the 9 s, calculate the timeaverage increase ?R in air resistance. The mass of the rocket fuel used is negligible compared with that of the airplane.
The gage pressure in an automobile tire when measured during winter at 32 o F was 32 psig. The same tire was used during the summer when the temperature rose to 112 o F. If we assume that the volume of the tire did not change, and no air leaked out b..
The velocity of plane B relative to plane A can be expressed in the following form vb/a = Mi+Nj M i is the x-component of the velocity of plane B relative to plane A. what is the value of M, in km/h ?
A sphere 1 m in diameter floats half submerged in a tank of oil( Sg = 0.80). a.) What is the upward force acting on the sphere? b.) What is the minimum weight of an anchor w/ a density of 20,000 N/m^3 that will be required to submerge the sphere comp..
the hydrogen spectrum has a red line at 656 nm and a blue line at 434 nm. what is the firstnbsporder angular
the homogeneous gate shown in fig. p2.88 consists of one quarter of a circular cylinder and is used to maintain a water
the concrete slab of the basement is 11 m long 8 m wide and 0.20 m thick. during the winter temperatures are nominally
the pipe assembly is secured on the wall by the two brackets. if the weight of the flower pot is 50 lba determine
Calculate the minimal round-trip time delay for a radio communications link between Los Angeles and the satellite.
the members of the truss shown can withstand a maximum compressive force of 800 lb and a maximum tensile force of 2000
a heat exchanger is a device in which heat flows between two fluid streams brought into thermal contact through a
a piston-cylinder device contains 10 kg of water 150 c . initially 2 kg it is vapour phase. the water is then heated
a catheter is a specialised needle intended for long-term insertion into a vein in a patients arm. engineers are
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