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2 years ago

a scientists collects a core sample from 60 km deep in earth what will she most likley observe plz help taking a test

Physics

1 answer:

Svetradugi [14.3K]2 years ago

4 0

Answer:

Explanation:

A scientist collects a core sample from 60 km deep in Earth. Which characteristic will she most likely observe in this sample? C. The sample mainly consists of ...

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You wiggle a string,that is fixed to a wall at the other end, creating a sinusoidalwave with a frequency of 2.00 Hz and an ampli

FinnZ [79.3K]

Answer:

Explanation:

A general wave function is given by:

$f(x,t)=Acos(kx-\omega t)$

A: amplitude of the wave = 0.075m

k: wave number

w: angular frequency

a) You use the following expressions for the calculation of k, w, T and λ:

$\omega = 2\pi f=2\pi (2.00Hz)=12.56\frac{rad}{s}$

$k=\frac{\omega}{v}=\frac{12.56\frac{rad}{s}}{12.0\frac{m}{s}}=1.047\ m^{-1}$

$T=\frac{1}{f}=\frac{1}{2.00Hz}=0.5s\\\\\lambda=\frac{2\pi}{k}=\frac{2\pi}{1.047m^{-1}}=6m$

b) Hence, the wave function is:

$f(x,t)=0.075m\ cos((1.047m^{-1})x-(12.56\frac{rad}{s})t)$

c) for x=3m you have:

$f(3,t)=0.075cos(1.047*3-12.56t)$

d) the speed of the medium:

$\frac{df}{dt}=\omega Acos(kx-\omega t)\\\\\frac{df}{dt}=(12.56)(1.047)cos(1.047x-12.56t)$

you can see the velocity of the medium for example for x = 0:

$v=\frac{df}{dt}=13.15cos(12.56t)$

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3 years ago

What is potential difference

lisabon 2012 [21]

Answer:

VOLTAGE

Explanation:

Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. ... A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit

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3 years ago

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Which of the following is a function of the cardiovascular system?

ioda

Answer:

Explanation:

The CV system does all of the above

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1 year ago

Which type of device enables its users to see around corners? laser telescope microscope fiber optics

Doss [256]

Answer:

D. Fiber Optics

Explanation:

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3 years ago

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What pressure is transmitted to the wheel cylinder if 200N is applied on the brake pedal of master cylinder with a radius of 12c

Semmy [17]

Answer:

pressure = force/area

force = 200N

area = πr², π =3.142, r = 12 cm = 0.12 m

pressure = 200/3.142×(0.12)²

p = 200/3.142×0.24

p = 200/0.754

p = 265.25 Nm-¹ or 265.25 Pa

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2 years ago