A piece of aluminum (specific heat 0.910 kJ/kg degreesC) of mass 184 g at 72 degrees C is dropped into a Styrofoam cup filled with 131 ml water at 20 degrees CWhat are the final temperatures of the water and the aluminum? Hint 1: because the cup is well-insulated, you can assume that all the heat leaving the aluminum as it cools goes to heating the waterHint 2: How are the final temperature of the aluminum related to the final temperature of the water?(Use 4.19 kJ/kg degrees C for the specific heat of water.)
Hello J.I bet you knew they went up and down.anyway,,,,There is a typical unit that uses a hydraulic cylinder that telescopes as it travels upward.This is used in a lot of short lift situations like motels and others were the height is limited to about 60 feetThen there is a cable lift which works just as you might think except it attached to blocks that follow rails along the track in the elevator shafteven these have their limits to the height since the capacity is based on motor/gear train size and cable spool diameterTheoretically a lift could go to the moon but where do you spool the cable.? Of course an escalator is a type of elevator as well and used quite frequently in air portsWell there ya go .From the E
One which goes up and one that goes down.
There are so many types of elevators and it depends on its' use: Passenger service Freight elevators Stage lifts Vehicle elevators Boat elevators Aircraft elevators Residential elevator Limited Use / Limited Application Dumbwaiter Paternoster Scissor lift Material handling belts and belt elevators
The heat Qout from the metal heat Qin to the water In both cases Q mcdeltaT For the Al 0.184kg0.910kJ/kgC(72-Tf) 12.0557 - 0.1674Tf For water 0.131kg4.19kJ/kgC(Tf-20) 0.5489Tf - 10.978 setting these equal gives 12.0557 - 0.1674Tf 0.5489Tf - 10.978 Simplifying gives 0.7163Tf 23.0335 Therefore Tf 23.0335/.7163 32.2degC
