Why cell membrane consists of lipid bilayer?    

A beam has dimensions of b = 16 in., h = 24 in., and d = 21.5 in. and is reinforced with 2 No. 6 bars. The concrete strength is 9,100 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the strength Mn for this beam.

Find the indicated limit, if it exists.(7 points) 

Which of the following medications is most commonly used to treat ADHD in adults, and under which condition would it not be appropriate?

The two main classifications of stroke are ischemic and hemorrhagic. Which of the following in NOT a common modifiable risk factor for ischemic stroke?

A simply supported beam with dimensions of b = 12 in., h = 24 in., d = 21.5 in., and L = 21 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.7 kips/ft and a uniform service (unfactored) live load of 1.5 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.      

In a reinforced concrete beam, the neutral axis needs to be adjusted up and down until section equilibrium is established.

A beam has dimensions of b = 18 in., h = 12 in., and d = 9.5 in. and is reinforced with 4 No. 11 bars. The concrete strength is 4,700 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 6.388 in., does the reinforcement yield?

Which of the following statements about the classifications of seizure disorders is NOT true:

Find the indicated limit, if it exists.(7 points)