Determining γ for air all bullets must be addressed in your lab write-up, and a random subset will be graded. design an experiment to determine the constant (the ratio of the heat capacity at constant pressure to the heat capacity at constant volume), for air. you have an air-filled two-liter bottle at a pressure in the range 135-145kpa (ask your ta for if it is too low), a pressure sensor linked to a computer (the file is "2 liter bottle"), and a lever by which you can compress the bottle. you should start with a quick compression, then decide whether, to provide enough information to calculate what you seek, this process should be followed (immediately) by another one. note: it would probably be a very good idea to review in your text the concept of an "adiabatic process" before proceeding with your experiment.

Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

In a good thermo flask the main cause of heat loss is