All categories

3 years ago

Systems are classified as human-made or natural. Match each example to the correct type of system.

Chemistry

2 answers:

BabaBlast [244]3 years ago

8 0

Answer:

Explanation:

Natural System:

1. solar system

2. plant root system

3. human digestive system

Human-Made System:

1. telephone system

2. city transit system

3. water purification system

Sidana [21]3 years ago

3 0

Answer: Here is the answere with a picture view for better understanding.

You might be interested in

HELPPPPPPPPPPPPOOOooooooo

DiKsa [7]

The answer is .001 g.

4 0

3 years ago

A plastic rod becomes negatively charged when it is rubbed with a piece of wool. how does the rod become charged?

Lera25 [3.4K]

Answer;

c.electrons move from the wool to the rod.

Explanation;

-Atoms are generally neutral (have the same number of protons as electrons). Substances lose electrons to become positively charged, while other substances gain electrons to become negatively charged.

-When a plastic rod is rubbed with woolen cloth or wool, a transfer of electrons occurs (from the wool to the rod). The rod gains electrons; thus, it is negatively charged.

4 0

4 years ago

Read 2 more answers

What is the volume of 6.50g of gold if the density of gold is 19.3g/ml?

Jet001 [13]

Answer:

0.33 ml

Explanation:

Formula for density: p = m/V (where p is density, m is mass and V is volume)

So, by applying the above formula:

$19.3 = \frac{6.5}{v}$

$v = 0.33 \: ml$

7 0

3 years ago

An element consists of two isotopes. The abundance of one isotope is 95.72% and its atomic mass is 114.9041 u. The atomic mass o

meriva

Answer:

d. 114.8 u

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

For first isotope:

% = 95.72 %

Mass = 114.9041 u

For second isotope:

Since the element has only 2 isotopes, so the percentage of second is 100 - first percentage.

% = 100 % - 95.72 % = 4.28 %

Mass = 112.9043 u

Average Mass = ?

Thus,

$Average\ atomic\ mass=\frac {95.72}{100}\times {114.9041}+\frac {4.28}{100}\times {112.9043}\ u$

Average atomic mass = 114.8 u

3 0

3 years ago

Are mossed and ferns climax community or pioneer species

Yuliya22 [10]

Answer:

Pioneer species I believe.

Explanation:

5 0

3 years ago