3 years ago

Which of the following is a category of mechanical wave?

Physics

2 answers:

givi [52]3 years ago

8 0

Answer:

because the mechanical wave is when it goes over and over again

castortr0y [4]3 years ago

6 0

Answer:

The answer is a like i said 3hrs ago i dont know if this guy copied me tbh

Explanation:

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If element X has 39 protons, how many electrons does it have?

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This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The mag

sweet-ann [11.9K]

Answer:

Explanation:

Given

coefficient of kinetic friction $(\mu _k)$ =0.34

inclination $\theta =44$

weight of block=51 N

(a) When block is moving upward friction force acts downward

thus

$Fsin\theta -W-f_r=0$

as block is moving with constant velocity thus $F_{net}$ is zero

$f_r=\mu _kN=0.34\times Fcos\theta$

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(b)When Block slides down the wall friction changes its direction to oppose the block

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$F\left ( \sin \theta +\mu \cos \theta \right )=W$

$F=\frac{W}{\left ( \sin \theta +\mu \cos \theta \right )}$

$F=\frac{51}{0.939}=54.299 N$

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4 years ago

Satellite communication is only possible using

RoseWind [281]

Answer:

its b

Explanation:

8 0

3 years ago

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What is the pressure 200m below the surface of liquid of density 2300kg/m^3?

Lunna [17]

Answer:

h−200m

p−1060kg/m

g−9.8m/s

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Explanation:

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