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2 years ago

which unit of measure would scientist use to measure the thickness of rock layer, created as a result of volcanic activity

2 answers:

7 0

A scientist would use a unit of length appropriate for the magnitude of what he or she is measuring. In this case, since rock is built up very slowly, they would probably use millimetres or centimetres. In some cases they may use meters.

There you go.

frozen [14]2 years ago

3 0

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25 PTs

Nuetrik [128]

Answer:
They are both wrong!

Liquid oxygen really is a pale blue color.
I’ve seen it.

And they cant say that liquid and solid oxygen is blue which makes the sky blue because they’re not and it doesn’t make up for the color of the sky.

The sky is actually blue because It reflects more light than It can absorb
aka Rayleigh Scattering.

-HOPE THAT HELPED

8 0

2 years ago

Lighting a match changes chemical energy into heat and light. The total amount of energy _____.

Mariulka [41]

Hello.

The answer is <span>remains the same.

</span>The total amount of energy stays the same because the 1st Law of Thermodynamics states that energy can neither be created nor destroyed, it can only change forms. <span>So the chemical energy is just being converted into heat and light.
</span>
Have a nice day

8 0

2 years ago

Read 2 more answers

What difference will you get from the flying or air filled balloon and the hydrogen filled balloon.

mash [69]

Answer:

the hydrogen filled balloon is denser than the air filled balloon

6 0

3 years ago

The gravitational force, F, between an object and the Earth is inversely proportional to the square of the distance from the obj

andreev551 [17]

<h2>Weight of astronaut 2450 miles above the Earth is 80.38 pounds</h2>

Explanation:

Given that gravitational force, F, between an object and the Earth is inversely proportional to the square of the distance from the object and the center of the Earth.

$F=\frac{k}{r^2}$

Where F is gravitational force between an object and the Earth, r is the distance from the object and the center of the Earth and k is a constant.

Radius of Earth = 4000 miles

In case 1 an astronaut weighs 209 pounds on the surface of the Earth,

$209=\frac{k}{4000^2}\\\\k=3.344\times 10^9$

Now we need to find weight of astronaut 2450 miles above the Earth

r = 4000 + 2450 = 6450 miles

$F=\frac{k}{6450^2}\\\\F=\frac{3.344\times 10^9}{6450^2}=80.38pounds$

Weight of astronaut 2450 miles above the Earth is 80.38 pounds

3 0

3 years ago

1. A fluid with viscosity 1.2 Pa s moves through a 200-m-long pipe with a 20 cm diameter. What difference in pressure between th

Helen [10]

(1) The difference in pressure between the ends of the pipe is 611 kPa.

(2) The Reynold's number for this torpedo is 1.2 x 10⁷.

(3) The flow of water around the torpedo is turbulent.

<h3>Difference in pressure between the ends of the pipe</h3>

The difference in pressure is calculated by applying Poiseuille formula.

$V = \frac{\pi \Delta P r^4 t}{8\eta L} \\\\\frac{V}{t} = \frac{\pi \Delta P r^4 }{8\eta L}\\\\Q = \frac{\pi \Delta P r^4 }{8\eta L}$

where;

Q is flow rate
r is radius of the pipe
L is length of the pipe
η is viscosity
ΔP is change in pressure

$\Delta P = \frac{8Q\eta L}{\pi r^4}$

$\Delta P = \frac{8(0.1)(1.2)(200)}{\pi (0.1)^4} \\\\\Delta P = 611,155 \ Pa\\\\\Delta P \approx 611 \ kPa$

<h3>Reynold's number for the torpedo</h3>

$Re = \frac{Vl \rho }{\mu} \\\\Re = \frac{(10)(1.2)(1000)}{1 \times 10^{-3}} \\\\Re = 1.2 \times 10^7$

<h3>Laminar or turbulent flow </h3>

A flow is considered laminar if the Reynolds number is up to 2300.
A flow is considered turbulent if the Reynolds number is greater than 3500.

The calculated Reynold's number (1.2 x 10⁷) is greater than 3500. Thus, the flow is turbulent.

Learn more about turbulent flow here: brainly.com/question/12081428

#SPJ1

8 0

2 years ago