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2 years ago

How can food help an organism to maintain cells and grow?

Physics

1 answer:

Lostsunrise [7]2 years ago

3 0

Answer:

Cells are able to receive energy from a wide variety of sources, depending on the type of organism that they are a part of. ... Our cells break down the sugars, fats, carbohydrates and proteins found in our food and convert them into the energy they need to keep our bodies going

Explanation:

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Which type of thermal energy transfer occurs mostly in fluids?

Dmitry_Shevchenko [17]

The answer is:

Heat transfer.In order to heat up water there has to be a way that the heat puts energy into the water,which make is rise in temperature.

I hope this helps :D

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3 years ago

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A woman has a mass of 55kg on earth, what is her mass on the moon

KengaRu [80]

Answer:

55 kg

Explanation:

Mass does not change and is not dependant on gravity. So even though your weight will be less on the moon your mass won't change.

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3 years ago

A transverse sinusoidal wave is moving along a string in the positive direction of an x axis with a speed of 89 m/s. At t = 0, t

earnstyle [38]

Answer:

The answer is below

Explanation:

Given that:

y = transverse displacement = 4.2 cm = 0.042 m at x = 0 and t = 0.

Speed = v = 89 m/s, maximum transverse speed of the string particle = $u_m$ = 16 m/s.

ω = $u_m$ / $y_m$ = 16 / 0.42 = 380.95 rad/s

a) Frequency = ω/2π = 380.95 / 2π = 60.63 Hz

b) Wavelength (λ) = speed / frequency

λ = v / f = 89/63.66= 1.468 m

c) Using the wave equation:

$y=y_msin(kx \pm wt \pm \phi)\\y=0.042,t=0,x=0\\\\Hence\\y_m=0.042\ m$

d) Wave number k is given by:

k = 2π / λ = 2π / 1.468 = 4.28 rad/s

e) The angular velocity is given by:

ω = $u_m$ / $y_m$ = 16 / 0.42 = 380.95 rad/s

f) Using the wave equation:

$y=y_msin(kx \pm wt \pm \phi)\\\\y=0.042,t=0,x=0,y_m=0.042\\\\Hence\\0.042=0.042sin(4.28(0)\pm 380.95(0)\pm \phi)\\\\sin\phi=1\\\\\phi=\frac{\pi}{2} \\\\y=0.042sin(4.28x\pm 380.95t\pm \frac{\pi}{2})$

g) Since the wave is in the positive x direction, hence ω is negative

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3 years ago

A plane electromagnetic wave, with wavelength 2.8 m, travels in vacuum in the positive direction of an x axis. the electric fiel

Arte-miy333 [17]

Ok first you gotta know what they are actually even asking you.

Frequency = wavelengths per second
Angular Frequency = radians per second
Wave Number = wavelengths per meter
Angular Wave Number = radians per meter

Frequency is Easy, just divide the speed of light by the wavelength. This is your answer for A.

Angular frequency is how many radians per second the ELECTRIC FIELD moves through over one second. We know that there are 2π radians in one wavelength.

So to get the angular frequency just multiply the regular frequency by 2π (6.28) to get the frequency in terms of radians per second (instead of waves per second). This is your answer for B.

The wave number of a photon is how many waves per meter the photon moves through rather than waves per second, similar but different to the 'frequency' calculations above.

Simply find the waves per meter (1 meter divided by the wavelength) and multiply by 2π to get the radians per meter. this is your answer for C.

NOTE: make sure your units are all correct, wavelength in meters, frequency in Hz etc...

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3 years ago

Which of the following could lead to a potentially violent situation?

beks73 [17]

Getting this answer wrong

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3 years ago

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