Harmonic excitation refers to a sinusoidal external force of a certain frequency applied to a system. ... Resonance occurs when the external excitation has the same frequency as the natural frequency of the system. It leads to large displacements and can cause a system to exceed its elastic range and fail structurally.
Answer:
C). rearview mirror (at least of four inches by four inches).
Explanation:
<u>A 'rearview mirror' would be needed in case one is required to pull an individual on water skis after a PWC(personal watercraft) that is rated for carrying two persons only</u>. This wide-angle mirror for rearview would allow the operator to monitor the person who is being towed constantly along with riding the ski at the same time. It is considered illegal to tow a person on a vessel without having a rearview mirror and at the same time, the limited capacity must also be followed strictly. Hence, <u>option C</u> is the correct answer.
Answer:
B
Explanation:
becuase this is the best optimal answer when it comes to this particular situation of choice
Answer:
the two defects of a simple cell are:
1. Polarization
2. Local action
Answer:
3rd and 4rth
Explanation:
a geologist studies the earth and both of these have something to do with the earth
