Froude number Fr is ratio of

Circular cylinder with diameter  2 mm  (von Karman vortices) is open to  wind speed 10 m/s ( = 1510^-6 m²/s). The frequency  is (Hint: calculate Re_d and look from chart Strouhal Sr value)

When Mach number Ma is less than 0.3, gas flow can be considered as

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Amalya wants to buy packages of almonds and Brazil nuts.  Her original budget line is line 1.  Line 2 shows what her new budget line could possibly look like if her income decreases, the price of almonds decreases, and the price of Brazil nuts remains unchanged.

Natalia wants to buy honey and peanut butter.  She has $108 to spend.  Honey costs $9 per jar and peanut butter costs $4.50 per jar.  The following table shows the total utility she will derive from each good at the different quantities she can afford.

Which would be her optimal bundle?

Just enter the letter of the bundle.

Roman is buying tennis balls and golf balls.  He has a monthly budget of $28.

Based on the budget line below, what is the price per tennis ball?

 y⁺ means

Reynolds number for pipe flow can defined

w is velocity,  is density, d is pipe diameter, is viscosity (kg/ms), is kinematic viscosity (m²/s), q_m is mass flow rate and Q is volume flow rate