中国大学MOOC: A uniform circular motion on xoy plane can be treated as the superposition of a simple harmonic motion in x direction and another simple harmonic motion in y direction.

A uniform circular motion on xoy plane can be treated as the superposition of a simple harmonic motion in x direction and another simple harmonic motion in y direction. A: 正确 B: 错误

What kind of filter is used to extract a single-freq. harmonic from the harmonic components contained in square wave? A: Low-pass Filter B: High-pass Filter C: Band-pass Filter D: Band-elimination Filter

Theseconventionaldeclinecurvetechniquesincludeequationsfor()decline. A: exponential B: harmonic C: hyperbolic D: alloftheabove

What can be done to silence a piece of music? A: Plus harmonics B: Plus envelope C: Synthesis D: Harmonic transformation

Which of the following motions exhibit no impulse in a cam mechanism? A: Constant acceleration motion B: Harmonic motion C: Cycloidal motion D: 3-4-5 orders polynomial motion

Which of the following motions will cause flexible impulse in a cam mechanism? A: Constant velocity motion B: Constant acceleration motion C: Harmonic motion D: Cycloidal motion

Three types of Arps equation, Exponential decline has ( ), harmonic decline has ( ), and hyperbolic decline has ( ). A: b=0 B: b=1 C: b>1 D: 0

100%<br/>Protection for generator stator single phase earth fault() A: zero<br/>sequence voltage protection B: third<br/>harmonic voltage protection C: zreo<br/>sequence current

Longitudinal wave(纵波) in a spring(弹簧) actually consist of a series of (一连串的) coupled harmonic oscillations(耦合简谐振荡), a conclusion that can be extended(推广) to longitudinal waves in all media(介质).