Physics Heat & Thermodynamics Level: University
Flow of heatThe air temperature over a lake is -10 degrees celius while the water below the surface of the ice (now 1.00 cm thick is at 4 degrees celius. What is the speed at which the ice layer on the lake thickens ( measured in m/s or some multiple thereof) ? Information you may need: The thermal conductivity of ice is 1.6 w/(mk) the specific heat of ice is 2000J/kg degrees celius) that of water is 4186 J/kg degrees celius) and the latent heat of fusion of water is 334kJ/kg.
Physics Heat & Thermodynamics Level: University
Carnot cycleA carnot refrigeration is used to make 1 kg of ice at - 10 C from 1 kg of water at 20 C, Which is also the temperature of the kitchen. How many joules of work must be done?
Physics Heat & Thermodynamics Level: University
Carnot EngineThe total drop of wollomombi Falls of Australia is 482 m. What would the carnot efficiency of an engine operating between top and bottom of the falls if the water temperature at the top were 10C and all the potential energy of the water at the top were converted to heat at the bottom?
Physics Heat & Thermodynamics Level: University
Carnot Engine
A carnot engine operating between 580 F and 120F has a power output of 120 hp. How much heat per minute does it absorb? How much does it exhaust?
Physics Heat & Thermodynamics Level: University
Cornot EngineThree designs for a heat engine to operate between 450 K and 300 K are proposed . Desing A is claimed to require a heat input of 2kJ for each kJ of work output design B a heat input of 3 kJ and design C a heat input of 4 kJ. Which design would you choose and why?
Physics Heat & Thermodynamics Level: University
The indicator diagram of a certain engine is shown in attachment. (a) Find the work done in each part of the cycle
namely a = b, b= c c= d and d=a ( substitute arrow for = sing)
and identify it as work done by or on the engine. (b) How much net work is done per cycle by the engine?
Physics Heat & Thermodynamics Level: Middle School
A gas expands by 1 L at a constant pressure of 2 bars. During the expansion 500 J of heat is added. Find the change in the internal energy of the gas.
Physics Heat & Thermodynamics Level: University
Gas Law
We have a container of a hot ideal monatomic gas. The volume
of the container is 25 liters. The temperature of the gas is 432 degree Celsius
and its pressure is 0.858 X 10^5
Physics Heat & Thermodynamics Level: University
Gas Law750 ml of a gas at 127 degrees celsius and 800 mm Hg would occupy. What volume at STP?
Physics Heat & Thermodynamics Level: University
Gas lawHow great a temperature change occurs for a gas at 350 mm Hg and 220 L if it occupied 500 L at 0 deghrees C and 700 mm Hg?
Physics Heat & Thermodynamics Level: University
Gas LawWhat is the final temperature in celsius of a gas occupying 3.25L at 750 mm Hg if it occupied 2250 mL at 37 degrees C and 600 MM Hg?
Physics Heat & Thermodynamics Level: University
Charles LawA gas occupies 60 L at 250 degrees K and 1 atm. What is the volume at 250 degrees C and 1.5 atm?
Physics Heat & Thermodynamics Level: University
Buyles LawWhat is the volume of a gas at 275 mm Hg if it occupied 750 mL at 1000 mm Hg?
Physics Heat & Thermodynamics Level: University
Why must a room air conditioner be set paratilly out of a window? Why can't it just be set in the center of a room and plugged in? Note that we are talking about an air conditioner not a water evaporative cooler ( swamp cooler).
Physics Heat & Thermodynamics Level: University
Carnot EngineWhen an automobile engine overheats and the radiator water begins to boil the car can still be driven some distance before catastrophic engine damage occurs. why? What determines the onset of really disastrous overheating?
