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3 years ago

7

In making water safe to drink, which process removes impurities by forcing water through sand or charcoal? A. aeration B. coagul

ation C. filtration D. disinfection

1 answer:

spin [16.1K]3 years ago

4 0

The answer is C! I knew this way before taking the test

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What is the mechanical advantage of a pulley system

tatuchka [14]

Answer:

Pulleys accomplish 2 separate operations throughout the computer controlled additional benefit technologies listed elsewhere here.

Explanation:

If indeed the pulley would be connected to that same attachment point, these are named a corrected pendulum or perhaps a change in direction. Its job should be to reverse the trajectory of that same rope pull.
Unless the pulley would be connected to that same load, this same pulley seems to be a detachable as well as a mechanical additional benefit.

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2 years ago

The liquid contained in batteries that conducts electric charge is called the: solution, electrolyte, suspension, colloid

blondinia [14]

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The liquid contained in batteries that conducts electric charge is called the. electrolyte.

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3 years ago

A car travels at a steady 40.0 m/s around a horizontal curve of radius 200 m. What is the minimumcoefficient of static friction

zhenek [66]

Answer:

c. 0.816

Explanation:

Let the mass of car be 'm' and coefficient of static friction be 'μ'.

Given:

Speed of the car (v) = 40.0 m/s

Radius of the curve (R) = 200 m

As the car is making a circular turn, the force acting on it is centripetal force which is given as:

Centripetal force is, $F_c=\frac{mv^2}{R}$

The frictional force is given as:

Friction = Normal force × Coefficient of static friction

$f=\mu N$

As there is no vertical motion, therefore, $N=mg$ . So,

$f=\mu mg$

Now, the centripetal force is provided by the frictional force. Therefore,

Frictional force = Centripetal force

$f=F_c\\\\\mu mg=\frac{mv^2}{R}\\\\\mu=\frac{v^2}{Rg}$

Plug in the given values and solve for 'μ'. This gives,

$\mu = \frac{(40\ m/s)^2}{200\ m\times 9.8\ m/s^2}\\\\\mu=\frac{1600\ m^2/s^2}{1960\ m^2/s^2}\\\\\mu=0.816$

Therefore, option (c) is correct.

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3 years ago

If these gas molecules were compressed further, how would the average kinetic energy of the molecules be affected? A. It would i

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I believe the correct response would be B. It would decrease.

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3 years ago

A wave travels down the length of a 25-meter rope in 5.0 seconds. The speed of the wave is _____.

Alborosie

Speed
= (distance covered) / (time to cover the distance)

= (25 m) / (5.0 sec) = 5.0 m/s .

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2 years ago

Read 2 more answers