3 years ago

WILL AWARD OVER 50 POINTS TO WHOEVER ANSWERS FIRST

1 answer:

4 0

Waves can and do meet boundaries in their medium. When a wave meets a boundary, it can be reflected or transmitted. ... Refraction occurs when a wave crosses a boundary from one medium to another. A wave entering a medium at an angle will change direction.

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Choose the answer that best describes hydrostatic equilibrium.

makvit [3.9K]

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What is the density of a iphone with a mass of 200g and a volume of 40cm3

Leviafan [203]

Answer: 5 gm/cc

Explanation:

200 gm/40 cc
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2 years ago

What creates more pressure?

Evgesh-ka [11]

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2 years ago

A violin string vibrates at 260 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way do

Advocard [28]

Answer:

346.66 Hz

Explanation:

$l_1$ = Length of string which is unfingered = l

$l_2$ = Length of string which is vibrate when fingered = $l-\dfrac{1}{4}l=\dfrac{3}{4}l$

$f_1$ = Unfingered frequency = 260 Hz

$f_2$ = Fingered frequency

Frequency is inversely proportional to length

$f=\dfrac{1}{l}$

So,

$\dfrac{f_1}{f_2}=\dfrac{l_2}{l_1}\\\Rightarrow \dfrac{f_1}{f_2}=\dfrac{\dfrac{3}{4}l}{l}\\\Rightarrow \dfrac{f_1}{f_2}=\dfrac{3}{4}\\\Rightarrow f_2=\dfrac{4}{3}f_1\\\Rightarrow f_2=\dfrac{4}{3}260\\\Rightarrow f_2=346.66\ Hz$

The frequency of the fingered string is 346.66 Hz

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2 years ago

What is the velocity of the 100 kg cart at point b?

Gre4nikov [31]

I believe the answer is c

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