Which phenomenon prevents indefinitely increasing propeller rotational speed on aircraft?

💡 Explanation

Transonic drag prevents indefinitely increasing propeller rotational speed, because the blade tips approach the speed of sound, greatly increasing form drag due to wave formation; therefore, drag surges rather than constant speed, and it becomes more than aerodynamic flutter.

• Which outcome occurs when a pulsed laser with wavelength near the material's bandgap illuminates a semiconductor?
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