Forget the altitude. Care about the temperature!The speed of sound is dependent on the temperature and not on the air pressure of the altitude. At 20 degrees celsius or 68 degrees Fahrenheit the speed of sound is 343 m/s or 1236.3 km/h or 1126.7 ft/s or 667.1 knots.Scroll down to related links and look at "Speed of sound - temperature matters, not air pressure".Here is an easy calculator if you know the temperature. Do not care about the altitude!Scroll down to related links and look at "Calculation of the Speed of sound in air and the important temperature".Asume a temperature of -70 degrees Celsius for a height of 44,000 feet.
A high temperature will make it spontaneous.
∆G = ∆H - T∆S and for it to be spontaneous, ∆G should be negative. If both ∆H and ∆S are positive, in order to get a negative ∆H, the temperature needs to be elevated in order to make the ∆S term greater than the ∆H term. So, I guess the answer would be "the higher the temperature, the more likely will be the spontaneity of the reaction."
h
Heat loss by any route may be expressed in the general equation H = kA(Tc−Ta). where H is the loss in Joules/s, k is the cooling constant, A is the surface area, and Tc–Ta is the difference between coffee temperature and air temperature. it takes about 4 joules of heat for the temperature of one gram of water to increase by 1 degree centegrade.
the air can have very little moisture
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if the astra h has not got fog lights fitted they can be added it involves some tech2 work to enable them change the light switch for one with front fogs on and if you dont have the wiring in place you ll need to wire into the UEC and fuse and relay to power check out the astra h forums for a how to
under the handbrake
insp in my care wathe theis
There are a number of sites where one can find information on Astra H car specifications. One site that is very good is the "ultimatespecs" website which offers specs for different models and different years.
Does it always give false readings or just at times near start up? thought this may helpThe outside air temperature sensor is located in the frontgrill area under the front bumper of the vehicle. The HAVC control head usesthis sensor to receive information on ambient air temperature. With this information,the HVAC control head will give the driver the outside air temperature on the digital display. If the outside temperature increases, the displayed temperaturewill not change until:The vehicle's speed is above 32 km/h (20 mph) for approximatelyone and a half minutes.The vehicles speed is above 72 km/h (45 mph) for approximatelyone minute.These delays help prevent false readings. If the displayed temperaturegoes down, the outside temperature display is updated immediately. If thevehicle has been turned off for more than three hours, the current outsidetemperature will be shown when the vehicle is started. If it has been turnedoff for less than three hours, the temperature will be recalled from the previousvehicle operation.
under the ECU on the upper side of the intake manifold
Try this site. It includes a lot of detail about the Astra talgate/boot lock assembly including the circuit diagram you need. http://sites.google.com/site/gmlockrepairkit/home/astra-h-zafira-b
Sydney H. North has written: 'Low temperature distillation' -- subject(s): Coal, Distillation, Fuel 'Compressed air in mining and industry'
H. H. Kingham has written: 'Surface temperature patterns in Christchurch at night' -- subject(s): Atmospheric temperature, Climate
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