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A bee flies on a trajectory such that its polar coordinates at time t are given by
r = bt/τ2 (2τ -t) θ=t/τ (0≤t≤2τ),
where b and τ are positive constants. Find the velocity vector of the bee at time t. Show that the least speed achieved by the bee is b/τ . Find the acceleration of the bee at this instant.
water flows in a long electrically heated tube with q constant constant heat flux. the velocity and temperature
an electric circuit consists of a 12-v storage battery a 10 ohm resistor and an electric motor connected in parallel.
an air standard diesel cycle has a compression ratio of 20 and the heat transferred to the working fluid per cycle is
A rectangular unfinished concrete channel with a width of 18 ft conveys water at 350 ft3/s. The temperature of the water is at 30oC. The channel has a slope of 0.001. Determine the liquid depth for uniform flow. Is the flow supercritical or subcritic..
atmospheric air at 95 kpa 30 degrees celcius and 75 humidity is to be conditioned at constant pressure so that it
a 2.0 cubic meter rigid tank contains a water-vapor mixture at 100 kpa. heat is transfered until the pressure reaches
Air enters an adiabatic nozzle at 5.18 MPa and 400K with a velocity of 20 m/s. The air exits at 2.00MPa. Determine the maximum exit velocity for this nozzle.
a steel pipe of 100-mm diameter is to support the loading shown. knowing that the stock of pipes available has
A disc 40 cm in diameter and 5 cm thick is to be cast using pure aluminium in an open mould operation. The melting point of aluminium is 660°C, and the pouring temperature will be 800°C.
An adsorption chromatographic separation of a mixture of closely related isomers.
Give the advantages and drawbacks of metal matrix composites over polymer matrix composites.
the rod is made of a-36 steel and has a diameter of 0.25 . if the rod is 4 long when the springs are compressed 0.5 .
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