Specify a parallel key for a gear to be mounted on a shaft with a 2.00 in diameter. the gear transmits 21000 lb. in of torque and has a hub length of 4.00 in. use sae 1035 steel for the key and assume that the key material is weakest when compared with the shaft and hub materials. if sae 1035 steel is not suitable you can use stronger steel by specifying it.

Aspherical thermocouple measurement errors a spherical thermocouple made of constantin transfer coefficient between the gas and the thermocouple is h used to measure the temperature of a gas. the heat 400 w/m2 k. calculate the maximum diameter d of the thermocouple if the thermocouple's measurement error should be w 23 within 5% of the initial temperature difference in 5 seconds. for constantin, k 8920 kg/m3, and c 410 j/kg. k.