The Young’s modulus of aluminum is 69GPa, of nylon is 3GPa, of tungsten is 400GPa, and of copper is 117GPa. If equal-size samples were put under equivalent tensile stresses, how would you rank the materials by the degree to which they would be elongated?
Rank the wires from least elongation (least stretch) to most elongation (most stretch).
1. Aluminum
2. Tungsten
3. Nylon
4. Copper

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

Explain what happens at the saturation point when adding salt to water at room temperature.