Ask question

Ask question

All categories

Alekssandra [29.7K]

4 years ago

10

Which of the following is a method of purifying water? A. Freezing B. Aeration C. Combustion D. Fixation

2 answers:

Len [333]4 years ago

4 0

Commercial water purification systems employ a combination of coagulation, sand filtering, chlorination, and sometimes aeration to purify water, so the correct answer is B. Aeration

mafiozo [28]4 years ago

3 0

Your correct answer would be B.

Hope this helps!

You might be interested in

Please help on this one?

vova2212 [387]

Answer: The system internal energy is 40 Joules.

Explanation: As suggested, the formula $\Delta U = Q-W=(70-30)J = 40J$ should be used. 70 Joules worth of thermal energy are added, and the system does 30 Joules worth of work (energy expenditure).

7 0

3 years ago

Read 2 more answers

Why is the moon’s surface cratered, but the Earth’s is not

Scorpion4ik [409]

The comets hit the moon's surface because there is no atmosphere on the moon to protect it. The earth has an atmosphere so it is protected.

8 0

3 years ago

Need help ASAP shoving brainlest plsssss

seraphim [82]

The answer for this would be B!!

3 0

3 years ago

How fast is a wave moving if it has a frequency of 35 Hz and there are 6 meters between crest?

AnnZ [28]

V=f£
=35*6
=210m/s.....

5 0

3 years ago

Block A can slide relative to block B which, in turn, can slide on a perfectly smooth horizontal plane. If the initial velocity

Anna11 [10]

Answer:

the final velocity of the two blocks is $v = \frac{mv_o}{m+M}$

the distance that A slides relative to B is $S = \frac{v_o^2M}{2 \mu g (M+m)}$

Explanation:

From the diagram below;

acceleration of A relative to B is : $a = - ( \mu g + \frac{ \mu mg}{M})$

where

v = u + at

$0 = v_o + ( - \mu g - \frac{\mu m g }{M})t$

Making t the subject of the formula; we have:

$t = \frac{v_o M}{(\mu g )(M+m)}$

$v^2 = u^2 +2 as\\\\0^2 = v_o^2 - 2 (\mu g ) (\frac{M+m}{M})S\\\\$

$S = \frac{v_o^2M}{2 \mu g (M+m)}$ which implies the distance that A slides relative to B.

The final velocities of the two blocks can be determined as follows:

v = u + at

$v = v_o - \mu g \frac{v_oM}{\mu g (M+m)}\\\\v = \frac{\mu g mv_o}{m+M}\\\\$

$v = \frac{mv_o}{m+M}$

Thus, the final velocity of the two blocks is $v = \frac{mv_o}{m+M}$

4 0

3 years ago