Two parallel pipelines spaced 0.5 m apart are buried in soil having a thermal conductivity of 0.5 w/m·k. the pipes have outer diameters of 70.0 and 52.5 mm with surface temperatures of 175°c and 5°c, respectively. estimate the heat transfer rate per unit length between the two pipelines.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane

Select the correct lewis structure for fluorine which is group 7a element?