<h2>
Answer:</h2>
<em>Because when we polish the shoes, they gain charges or the shoes become charged, the small non-charged particles are attracted to them.</em>
<span>Object's speed is max when passing through 0 displacement.
Object's acceleration is max at either end of its oscillation, and these two times are 1/4 period apart.
y = A sin (wt)
v= Aw cos(wt)
a = - A (w^2) sin (wt)
v max = Aw
a max= -A w^2
These relations can give you w= 2 pi/ T
where T = period of oscillation.</span>
Answer:
210
Explanation:
A person's estimated maximum heart rate is 220 minus their age. Since she is 18, her maximum is <em>220 </em>- <em>18 </em>= <em>202</em>. As hers was 8 beats over her maximum, simply add 8 to 202 to find 210 as her heart rate.