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A ski lift has a one-way length of 1 km and a vertical rise of 200 m. The chairs are spaced 20 m apart, and each chair can seat three people. The lift is operating at a steady speed of 10 km/h. Neglecting friction and air drag and assuming that the average mass of each loaded chair is 250 kg, determines the power required to operate this ski lift. Also estimate the power required to accelerate this ski lift in 5 s to its operating speed when it is first turned on.
a small kiln for firing ceramic products has inside dimensions 1 m wide 1 m high and 1.5 m deep. the walls are 50 cm
a synchronous orbit about the earth is obtained when the period of the orbit is same as the length of the day. if the
rotor blades of a helicopter are of radius 5.2m and rotating at a constant angular velocity of 5 revs. the helicopter
Air (ideal gas) inside a cylinder filled with a frictionless piston undergoes a polytrophic process having an exponent n = 1.33. The initial pressure of the air is 3.34 MPa and the T (final) is 750 K and during the process the volume of the air is in..
Assume Complete combustion write out a stoichmetric equation for 1 mole of an arbitrary alcohol Cx Hy Oz determine the number of moles of air required to burn 1 mole of fuel?
air at 5 bar and 177degc state 1 is expanded through a turbine to 1 bar and 27degc state 2. the mass flow rate of air
the drag on a 2-m. diameter satellite dish in an 80 kmhr wind is to be determined by a wind tunnel test using a
a flame that produces 10kw of heat output is applied to one side of a 10cm by 10cm square of aluminum foil. the other
a mountain climber carries a barometer which reads 30.1 in hg at the base of the mountain. after her climb the
When the outside temperature is -10°C, a residential heat pump must provide 3.5 x 106 kJ per day to a dwelling to maintain its temperature at 20°C. If electricity costs 8 cents per kWh, determine the minimum theoretical operating cost for each day of..
the silver medal awarded to the second place winner in 2002 salt lake city winter olympics had a composition of 92.5 at
An unsuited free diver can work in a pressure of up to 490KN/m^2 and a suited diver in pressure of up to 1815 KN/m^2. Calculate the maximum depths at which they might work in sea-water which has a specific gravity of 1.03.
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