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2 years ago

Which of the following is not a technological way of improving air pollution

Chemistry

2 answers:

anyanavicka [17]2 years ago

4 0

Composting is not a technological way of improving air quality.

I hope this helps!

nydimaria [60]2 years ago

3 0

Answer:

C. composting

Explanation:

i took the test

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A ph of 2 indicates a

alekssr [168]

Nope mate I have no clue

5 0

3 years ago

Salt is poured from a container at 10 cm³ s-¹ and it formed a conical pile whose height at any time is 1/5 the radius of the abo

Romashka-Z-Leto [24]

Answer:

$\displaystyle \frac{dh}{dt} = \frac{1}{10 \pi}$

Explanation:

Volume of a cone:

$\displaystyle V=\frac{1}{3} \pi r^2 h$

We have $\displaystyle \frac{dV}{dt} = \frac{10 \ cm^3}{sec}$ and we want to find $\displaystyle \frac{dh}{dt} \Biggr | _{h\ =\ 6}= \ ?$ when the height is 2 cm.

We can see in our equation for the volume of a cone that we have three variables: V, r, and h.

Since we only have dV/dt and dh/dt, we can rewrite the equation in terms of h only.

We are given that the height of the cone is 1/5 the radius at any given time, 1/5r, so we can write this as r = 5h.

Plug this value for r into the volume formula:

$\displaystyle V =\frac{1}{3} \pi (5h)^2 h$
$\displaystyle V =\frac{1}{3} \pi \ 25h^3$

Differentiate this equation with respect to time t.

$\displaystyle \frac{dV}{dt} =\frac{25}{3} \pi \ 3h^2 \ \frac{dh}{dt}$
$\displaystyle \frac{dV}{dt} =25 \pi h^2 \ \frac{dh}{dt}$

Plug known values into the equation and solve for dh/dt.

$\displaystyle 10 = 25 \pi (2)^2 \ \frac{dh}{dt}$
$\displaystyle 10 = 100 \pi \ \frac{dh}{dt}$

Divide both sides by 100π to solve for dh/dt.

$\displaystyle \frac{10}{100 \pi} = \frac{dh}{dt}$
$\displaystyle \frac{dh}{dt} = \frac{1}{10 \pi}$

The height of the cone is increasing at a rate of 1/10π cm per second.

7 0

2 years ago

The energy transformations are similar because they both involve transformations that

blondinia [14]

Sorry but I don’t understand the question. Sorry I’m not any help

3 0

2 years ago

What types of materials are “Built” from petroleum?

galina1969 [7]

There's a lot of things built from petroleum, such as toothpaste.

Here's also another list.Gasoline 46%

Heating Oil / Diesel Fuel 20%

Jet Fuel ( kerosene) 8%

Propane / Propylene 7%

NGL / LRG 6%

Still Gas 4%

Petrochemical Feedstocks 2%

Petroleum Coke 2%

Residual / Heavy Fuel Oil 2%

Asphalt / Road Oil 2%

Lubricants 1%

Miscellaneous Products / Special Naphthas 0.4%

Other Liquids 1%

Aviation Gasoline 0.1%

Waxes 0.04%

Kerosene 0.02%

5 0

2 years ago

What is used to determine the number of each atom in an ionic formula?

Nutka1998 [239]

the oxidation state of each atom

3 0

3 years ago