Acommon structure feature of membrane lipids is their amphipathic nature. for example, in phosphotidylcholine, the two fatty acid chains are hydrophobic and the phosphocholine head group is hydrophilic. draw the structure of the following membrane lipids and show their hydrophobic and hydrophilic groups: a. phosphotidylethanolamine with fatty acids at c1 being stearic acid and c2 linoleic acid b. sphingomyelin with the fatty acid oleic acid c. glucosylcerebroside with the fatty acid being myristic acid d. cholesterol

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?