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4 years ago

Describe how this volcanic activity led to the formation of oceans

1 answer:

3 0

volcanoes blew craters in the earths surface and water fill it in and erosion did its part in the making and made the bottom smooth

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Luca wants to identify and quantity the chemicals causing air pollution in a city, but he is using a manual air sampler to colle

xenn [34]

Answer

Manual samplers are prone to effects of temperature, speed of wind and air concentrations.

Explanation

Manual samplers face several challenges that can act as drawbacks to obtaining accurate results. They are subjected to effects of sampling duration where long sampling times are needed to obtain adequate mass for detection. Manual samplers face challenges when measuring non-volatile species because particles are observed into the adsorption medium at a slower rate of diffusion.

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4 years ago

Briefly explain the benefits and consequences of technology.

Elza [17]

Well there are plenty of benefits and consequences.

But one would be the ability to do certain tasks without actually having to do them. A consequence could be on the environment. For example, the use of a car plays a big part on the environment involving smog.

Hope this helps!

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4 years ago

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Arrange the following solution in the increasing order of their H+ ion concentration?

Mars2501 [29]

Answer:

H2CO3,HCl

Explanation:

the rest are not acids but I arrange the acids based on their number of hydrogen

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3 years ago

What were the first 5 planets that were observed? Why were those the only ones? Help pls!

pogonyaev

Mercury Venus mars Jupiter Saturn

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3 years ago

2.998x10^8 m/s is how many kilometers per hour

Alex

1.079 x 10⁹ km/h

<h3>Further explanation</h3>

2.998 x 10⁸ m/s has been known as the speed of light.

Let us convert the unit m/s to km/hour.

Change in unit length:

If 1 km = 1,000 cm, then $\boxed{ \ 1 \ cm = 0.001 \ km \ } \rightarrow \boxed{ \ 1 \ cm = 10^{-3} \ km \ }$

Change in unit time:

If $\boxed{ \ 1 \ hour = 60 \ minutes = 3,600 \ seconds \ }$ , then $\boxed{ \ 1 \ second = \frac{1}{3,600} \ hours \ }$

The Process:

$\boxed{ \ 2.998 \times 10^8 \ \frac{m}{s} \times \frac{10^{-3} \ km}{1 \ m} \times \frac{1 \ s}{\frac{1}{3,600} \ hours} \ }$

$\boxed{ \ 2.998 \times 10^8 \times 10^{-3} \ km \times \frac{3,600}{hours} \ }$

$\boxed{ \ 10,792.8 \10 \times 10^5 \ \frac{km}{hour} \ }$

Remember, we must write the results in scientific notation, i.e.,

$\boxed{\ a \times 10^b \ } \rightarrow \boxed{ \ 1 \leq a < 10 \ } \rightarrow \boxed{ \ b \ must \ be \ an \ integer \ }$

Thus the result of unit conversion is

$\boxed{ \ \boxed{ \ 2.998 \times 10^8 \ m/s \ } \rightarrow \boxed{ \ 1.079 \times 10^9 \ km/h} \ }$

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Keywords: speed of light, convert, m/s to km/h, unit length, time, hours, minutes, second, scientific notation

5 0

4 years ago

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