Need help ASAP pls Which of the following statements about drag is true?

A flat plate has a lower drag coefficient than a sphere.
Objects with a low drag coefficient will have less drag force than objects with a higher drag coefficient.
A drag coefficient is basically the sum of the high and low pressures on the front and back of an object in motion.
Streamlining should be avoided as this usually leads to higher drag coefficients.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.