Which type of wave cannot travel through a vacuum? visible light waves X-ray waves gamma ray waves sound waves
2 answers:
The correct answer to the question is- Sound waves i.e the sound waves can not move through vacuum.
EXPLANATION:
Sound wave is a mechanical longitudinal wave which requires a medium for its propagation. The medium may be solid,liquid or gas. It can not travel in space or vacuum.
As per Clark Maxwell's electromagnetic theory, the electromagnetic radiations are the waves which contain time varying electric and magnetic fields which are perpendicular to each other as well as perpendicular to the direction of propagation. Any electromagnetic wave can travel in space with the velocity of light i.e .
As per the question, we have X-ray, gamma ray,visible light and sound wave.
Except sound, all the waves i.e visible light, gamma ray and X-ray are electromagnetic in nature. So, these waves can travel in space.
Hence, the correct answer of this question is sound wave which can not travel in space or vacuum.
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Answer:
hello your question lacks some data and required diagram
G = 77 GPa, т all = 80 MPa
answer : required diameter = 252.65 * 10-^3 m
Explanation:
Given data :
force ( P ) = 660 -N force
displacement = 15 mm
G = 77 GPa
т all = 80 MPa
i) Determine the required diameter of shaft BC
considering the vertical displacement ( looking at handle DC from free body diagram )
D' = 0.3 sin∅ , where D = 0.015
hence ∅ = 2.8659°
calculate the torque acting at angle ∅ of CD on the shaft BC
Torque = 660 * 0.3 cos∅
= 660 * 0.3 * cos 2.8659 = 198 * -0.9622 = 190.5156 N
hello attached is the remaining part of the solution
