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3 years ago

Describe how water may be treated before people use it

2 answers:

kramer3 years ago

7 0

They purify the water so that people can use it for things and drinking. They chloride, boil, or use ultraviolet light to kill bacterias that can harm us

brilliants [131]3 years ago

3 0

Water is treated by purifying it by adding slaked lime or potash alum

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Taking test, need physics help<br> ASAP please!

Anuta_ua [19.1K]

Answer:

im pretty sure its c the third answer i got that one right

Explanation:

your welcome :)

8 0

2 years ago

For a long ideal solenoid having a circular cross-section, the magnetic field strength within the solenoid is given by the equat

andrezito [222]

Answer:

Radius of the solenoid is 0.93 meters.

Explanation:

It is given that,

The magnetic field strength within the solenoid is given by the equation,

$B(t)=5t\ T$ , t is time in seconds

$\dfrac{dB}{dt}=5\ T$

The induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid, x = 2 m

The electric field due to changing magnetic field is given by :

$E(2\pi x)=\dfrac{d\phi}{dt}$

x is the distance from the axis of the solenoid

$E(2\pi x)=\pi r^2\dfrac{dB}{dt}$ , r is the radius of the solenoid

$r^2=\dfrac{2xE}{(dE/dt)}$

$r^2=\dfrac{2\times 2\times 1.1}{(5)}$

r = 0.93 meters

So, the radius of the solenoid is 0.93 meters. Hence, this is the required solution.

4 0

3 years ago

Read 2 more answers

You are pushing a wooden crate across the floor at constant speed. You decide to turn the crate on end, reducing by half the sur

borishaifa [10]

Answer:

D. Half as great

Explanation:

Since we know that the friction force between the surface of crate and ground is given as

$F_f = \mu F_n$

so here we know that

$\mu$ = friction coefficient between two surfaces which depends on the effective contact area between two surfaces

$F_n$ = normal force due to the object

So when we turn the object on another side such that the surface area is half then the friction coefficient will become also half

So here the friction force will also reduce to half

so correct answer will be

D. Half as great

3 0

2 years ago

The data table shows how the amplitude of a mechanical wave varies with

Gnom [1K]

Answer:

162 units

Explanation:

Just did it on A pex

5 0

3 years ago

Read 2 more answers

If an Idaho driver violates the state's insurance mandate two or more times within ______ years, he or she will be required to p

Inessa05 [86]

Answer:

5 years

Explanation:

The insurances mandate states that every driver or owner of a car has to have an insurance at least covering third parties damages and hospital care, this is to prevent people from going broke because of a car accident, if you faile to have one they would make you have proof of financial responsability for a year, if ater that failing, you are caught again without insurance withint 5 years the proof of financial responsability increases to 5 years.

7 0

3 years ago