What happens when an experiment with new information or new technology produces results that support an existing theory?
a. the theory is considered proven.
b. the theory is revised or updated.
c. the theory becomes a law.
d. the evidence is ignored and thrown away.

The softest and hardest minerals are: softest hardest

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.

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.