<span>The acrylic plastic rod is 200 mm long and 15 mm in
diameter. If an axial load of 300 N is applied to it, determine
the change in its length and the change in its diameter.
. latd = -0.0002515 (15) = -0.00377 mm
elat = -Velong = -0.4(0.0006288) = -0.0002515
d = elong L = 0.0006288 (200) = 0.126 mm
elong = s
E = 1.697(106
)
2.70(109
) = 0.0006288
s = P
A = 300 p
4 (0.015)2 = 1.697 MPa
•3–25. T</span>
C. Electromagnetic waves do not always need a medium to travel.
Since they are transverse waves they do not need a material medium.
Answer: s=delta/360° ×2πr
Explanation:
The center of the wheel is located.The distance from the centre spoke to the outside wheel is the radius r...the distance between two spokes in the wheels is an arc which forms an angle(theta) at the centre... It is a fraction of the angle formed at the middle to the total angle of the wheel(360° as in circle) to the product of the circumference of the wheel(circle)
Length of arc(s)=theta/360 ×2πr
A change in velocity or a change in direction, or both! Hope this helps
