3 years ago

I NEED a LOT of help PLEASE!

2 answers:

3 0

Infrared, visible light, then ultraviolet. Infrared is light that the human eye can not see and visible light is clearly light we can see then ultraviolet is has such a high frequency we can't see it either.

KIM [24]3 years ago

3 0

It is B. Infrared, visible, ultraviolet.

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A ball of 0.5kg slows down from 5m/s to 3m/s. Calculate the work done in the process

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Answer: Cannot determine cause we need to know the change of time to calculate the work.

Explanation:

m = 0.5kg

V = 3m/s - 5m/s = -2m/s

P = W/t = Fv

F = ma

W = Fvt

W = (0.5)(9.8)t = 4.9t

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2 years ago

The value of acceleration due to gravity (g) on a point 10,000 kilometers above sea level is about 1.49 meters/second2. How much

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In your own words, explain how stalagmites are formed in caves.

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3 years ago

Glycerin at a temperature of 30 degrees celcius flows at a rate of 8×10−6m3/s through a horizontal tube with a 30mm diameter. wh

MariettaO [177]

The pressure drop in pascal is 3.824*10^4 Pascals.

To find the answer, we need to know about the Poiseuille's formula.

<h3>How to find the pressure drop in pascal?</h3>

We have the Poiseuille's formula,

$Q=\frac{\pi Pr^4}{8\beta l}$

where, Q is the rate of flow, P is the pressure drop, r is the radius of the pipe, $\beta$ is the coefficient of viscosity (0.95Pas-s for Glycerin) and l being the length of the tube.

It is given that,

$Q=8*10^{-6}m^3/s\\diameter=30mm, thus,\\r=15mm\\l=100m\\\beta =0.95$

Thus, the pressure drop will be,

$P=\frac{8Q\beta l}{\pi r^4} =\frac{8*8*10^{-6}*0.95*100}{3.14*(15*10^{-3})^4} \\\\P=3.824*10^4Pascals.$

Thus, we can conclude that, the pressure drop in pascal is 3.824*10^4 Pascals.

Learn more about the Poiseuille's formula here:

brainly.com/question/13180459

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1 year ago