Here's the solution ~
As we know, we can calculate the circumference of a circle in terms of its diameter as :
where, c = circumference and d = diameter
And also, circumference of circle is terms of radius (r) is :
Now, let's move on to questions ~
<h3>First </h3>
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<h3>Second</h3><h3 /><h3 /><h3 /><h3>
</h3>
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<h3>Third</h3>
・ ．━━━━━━━†━━━━━━━━━．・
<h3>Fourth</h3>
・ ．━━━━━━━†━━━━━━━━━．・
<h3>Fifth </h3>
・ ．━━━━━━━†━━━━━━━━━．・
<h3>Sixth</h3>
➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖
Answer:
(1 cm)cos3πt
Step-by-step explanation:
Since the piston starts at its maximal height and returns to its maximal height three times evert 2 seconds, it is modelled by a cosine functions, since a cosine function starts at its maximum point. So, its height h = Acos2πft
where A = amplitude of the oscillation and f = frequency of oscillation and t = time of propagation of oscillation.
Now, since the piston rises in such a way that it returns to the maximal height three times every two seconds, its frequency, f = number of oscillations/time taken for oscillation where number of oscillations = 3 and time taken for oscillations = 2 s
So, f = 3/2 s =1.5 /s = 1.5 Hz
Also, since the the piston moves between 3 cm and 5 cm, the distance between its maximum displacement(crest) of 5 cm and minimum displacement(trough) of 3 cm is H = 5 cm - 3 cm = 2 cm. So its amplitude, A = H/2 = 2 cm/2 = 1 cm
h = Acos2πft
= (1 cm)cos2π(1.5Hz)t
= (1 cm)cos3πt
Answer: 19 units
Step-by-step explanation:
Count from A down then the left until you reach B.
Answer:
-3x^4 + 5x^3 - 33x^2 + 25x - 3
//Hope it helps and it's right.
Answer:
_ _
1 2 all the way to twenty
Step-by-step explanation:
