A : a car driving down a hill
Take for example - you touching something sharp and instantly moving your hand away.
Sensory neurons in your fingers detect the external stimuli of the sharp object and send a nerve impulse to the spinal cord (does not reach brain) and is sent back to a motor neurone - attached to an effector that moves the muscle and moves the hand away. This is a rapid reflex action and involuntary.
Ph means health because i was in health class and she said ph means heath
The period of the D string on the violin would be 0.0034 seconds.
<h3>What is the period of a wave?</h3>
The period of a generated wave is the time it takes for the wave's wavelength or successive crests or troughs to pass through a specific point. In other words, it is the time required to complete a full cycle of oscillation.
Mathematically, the period of a wave is given by:
Period = 1/f
where f is the frequency of the wave.
In the case of the D string of the violin in the illustrated problem, the frequency of the wave is given as 293 Hz when it is in tune. Thus, the period can be calculated as:
Period = 1/293
= 0.0034 seconds
Thus, the period of oscillation of wave generated by the D string on the violin with a frequency of 293 Hz is 0.0034 seconds.
More on the period of waves can be found here: brainly.com/question/14588679
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