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A person with a mass of 85 kg wearing snow skis is gliding down a long slope at an angle of 15 degrees. Each ski is 185 cm lonf and 10 cm wide. the pressure of the skis on the snow melts a thin layer of water o that a 0.1 mm layer of water exists under each ski. The water layer is at a temprature of 0 C. Determine the maximum velocity that the skier will achieve without using poles. Neglect the drag force of the air on the skier.
A heat pump is used to maintain a house at a constant temperature of 23 °C. The house is losing heat to the outside air through the walls and the windows at a rate of 60,000 kJ/hr while the energy generated within the house from people
calculate the minimum heating and cooling requirements identify the pinch temperature and construct a temperature
just before it lifts off a 10500 kg airplane is traveling at 60 fts. the total horizontal force exerted by the planes
a timber beam is to be selected to sustain a maximum transverse shear of vmax 50 kn without exceeding an allowable
a flat plate solar collector 6ft by 12ft is mounted on the roof of a house. the outer surface of the collector is at
in a railroad switchyard a 50 ton freight car is sent at 7.4 mih toward a 27 ton car that is moving in the same
If the beam has square cross section of 9 in., on each side, determine the absolute maximum bending stress in the beam.
a pump is used to supply water from a well to a municipal water system. at the well the water is 10oc at 0 kpa gage.
A particular grade of Nitinol SMA is capable of upto 6% strain recovery and develops an internal restoration stress of upto 300 MN m-2. Estimate the amount of force and distance of travel that could be triggered by warming a rod
Calculate the static thrusts of the rocket and turbojet engine described in the figure. The thrust T is the force necessary to prevent horizontal movement of the engine. Both engines exhaust a mass flow of 40 kg/s.
the magnesium alloy modulus of elasticity e 44.7 gpa coefficient of thermal expansion 2610-6oc tube ab is capped with
Determine the distance d between the cars at which the driver of car A must apply his brakes to just avoid colliding with carB.
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