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3 years ago

6

About how long have wastewater treatment plants been in existence? about how long have wastewater treatment plants been in exist

ence? 50 years 120 years 190 years 220 years 300 years

1 answer:

ella [17]3 years ago

8 0

Water treatment plants have been in existence for almost 220 years

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Suppose a 50 turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil origin

Ilia_Sergeevich [38]

Answer:

EMF = 108.3 Volts

Explanation:

As per Faraday's law of electromagnetic induction we know that rate of change in magnetic flux will induce EMF in closed loop

So it is given as

$EMF = N\frac{d\phi}{dt}$

$EMF = N\frac{BA - 0}{\Delta t}$

now we know that

N = 50 turns

B = 1.5 T

A = 0.325 m^2

$\Delta t = 0.225 s$

now we have

$EMF = (50)(\frac{1.5\times 0.325}{0.225})$

$EMF = 108.3 Volts$

7 0

3 years ago

Construct a position-time graph that shows the forward progress of Sunny The Dog in a straight line for 20 meters over the cours

Aleksandr-060686 [28]

Answer:

The answer to your question is the second graph (the one attached).

Explanation:

We have to look for the graph that represents the data given.

a) The first graph is not correct because we look for a distance of 20 m, and this graph only goes from 0 to 10 m.

b) this graph is correct because it covers the distance (20 m) and the time (4 s)

c) This graph could be the right ooption but it is coming back and we look for a forward progress, then this graph is incorrect.

d) This graph shows that the dog is not moving, so this option is wrong.

8 0

2 years ago

An inclined plane is used to lift a box into a moving truck. The ramp is 6m long and 1.5m

ElenaW [278]

Given :

An inclined plane is used to lift a box into a moving truck. The ramp is 6 m long and 1.5 m.

To Find :

The mechanical advantage of the inclined plane.

Solution :

Mechanical advantage, M.A of an inclined plane is given by :

$M.A = \dfrac{\text{Length of slope}}{\text{Height of plane}}$

Putting given values in above equation, we get :

$M.A = \dfrac{6 \ m}{1.5 \ m}\\\\M.A = 4$

Therefore, the mechanical advantage of the inclined plane is 4.

5 0

3 years ago

Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable attached to the glider. Wha

aliina [53]

Answer:

P=627.47W

Explanation:

To solve this problem we have to take into account, that the work done by the winch is

$W=Fh$

the force, at least must equal the gravitational force

$F=Mg=(156kg)(9.8\frac{m}{s^2})=1258.8N$

with force the tension in the cable makes the winch go up.

The work done is

$W=(1258.8N)(58.0m)=73010.4J$

To calculate the power we need to know what is the time t. But first we have to compute the acceleration

The acceleration will be

$v_f^2=v_0+2ah\\a=\frac{v_f^2}{2h}=\frac{(24.9\frac{m}{s})}{2(58.0m)}=0.214\frac{m}{s^2}$

and the time t

$v_f=v_0+at\\t=\frac{v_f}{a}=116.35s$

The power will be

$P=\frac{W}{t}=\frac{73010.4J}{116.35s}=627.47W$

HOPE THIS HELPS!!

6 0

3 years ago

what will happen to the fieldof view for each resultant magnification as you change objectives from 4 to 10 to 43

jonny [76]

Answer:

The field of view is reduced.

Explanation:

Given that,

The field of view for every resultant magnification like you change objectives from 4 to 10 to 43.

We know that,

Field of view :

When the view is observed at a point in a defined field then these field called field of view.

The normal angle of field of view is 90°.

The formula of field of view is define as,

$field\ of\ view = \dfrac{field\ number}{magnification}$

We can say that,

The field of view is inversely proportional to the magnification.

When magnification is low then field of view will be large.

When magnification is higher then field of view will be small .

According to question,

When the magnification adjust from 4 to 10 to 43, the field of view is reduced.

Hence, The field of view is reduced.

7 0

2 years ago