Let h be the hemisphere
x2 + y2 + z2 = 29, z ? 0,
and suppose f is a continuous function with
f(2, 4, 3) = 15,

f(2, ? 4, 3) = 14,

f(? 2, 4, 3) = 15,
and
f(? 2, ? 4, 3) = 16.
by dividing h into four patches, estimate the value below. (round your answer to the nearest whole number.)

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

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.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?