3 years ago

PLEASE HELP ME ASAP!!!!! MARK U AS BRAINLEST!

Physics

2 answers:

zmey [24]3 years ago

8 0

D) both air temperature and medium

LenKa [72]3 years ago

6 0

The speed of a sound wave depends on C) The air temperature

Hope I helped you :)

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The vertical displacement of an ocean wave is described by the function, y = A sin(ωt - kx). k is called the wave number (k = 2π

MrMuchimi

Answer:

Explanation:

a ) y = A sin(B) ; here B is the phase of the wave which moves so that it remains constant

ωt - kx = constant

differentiating on both sides

ωdt - kdx =0

ωdt = kdx

dx / dt = ω / k

wave velocity = ω / k

b ) ω = 14.5 rad / s ,

k = 18 rad / m

wave velocity = ω / k

= 14.5 / 18

= .805 m /s

80.5 cm / s

c )

Amplitude = A

= 9.5 m

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3 years ago

A string of length L= 1.2 m and mass m = 20g is under 400 N of tension, its two ends are fixed. a. How many nodes will you see i

ozzi

Answer:

(iii) 6

Explanation:

Part a)

Since it is given that both ends are fixed and it is vibrating in 5th harmonic

So here it will have 5 number of loops in it

so we can draw it in following way

each loop will have 1 antinode and two nodes which means number of nodes is one more than number of anti-nodes

So there are 5 loops which means it will have 5 antinodes

and hence there will be 6 nodes in it

so correct answer will be

(iii) 6

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3 years ago

Myoncedyret

konstantin123 [22]

Answer:

i need help too

Explanation:

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3 years ago

_____ contains chemical energy.<br> A. Heat<br> B. Light<br> C. Natural gas

FinnZ [79.3K]

The answer is C. Natural gas because both A and B are their own forms of energy.

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2 years ago

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A motor develops 80 kW of power as it lifts a loaded elevator 20.5 m in 45 s. How much force does the motor exert? *

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Answer:

F=1.3⋅105N

Explanation:

It's common knowledge.

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2 years ago