PLEASE HELP, evaporation,liquids,solids, and gases involved

Please help !!! A 12 V battery is set up in an unknown configuration. The internal resistance of the battery is 4 Ohms. If this

Delvig [45]

Answer:

Explanation:

Given that,

Battery capacity

E=12V

Internal resistance of battery r=4ohms

We are told that the circuit must have at least 2 resistor

If the terminal voltage is Vt= 11.478V

Let all the resistor we want to connect the battery have a equivalent resistance Req

Req = R1 +R2 + R3+...+ Rn

Series connection

Using KVL in the circuit,

E = I(R+r)

12 = I ( Req + 4) equation 1

When the terminal voltage is 11.478V, I.e voltage across the external resistance, in this case the equivalent resistance Req

Using ohms law

Vt=I•Req

Then,

11.478 = I•Req equation 2

Make I subject of formulae

Then, I = 11.478/Req. Equation 3

Substitute equation 3 into 1

12 = I ( Req + 4)

12 = 11.478/Req ( Rea + 4)

12 = 11.478 + 45.912/Req

12 - 11.478 = 45.912/Req

0.522 = 45.912/Req

Cross mutilply

0.522 Req = 45.912

Then, Req = 45.912/0.522

Req = 87.95 ohms

Req ≈ 88 ohms

The resistor must have a resistance of 88 ohms and they have a series configuration

5 0

3 years ago

A house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at

yawa3891 [41]

Answer:

a) $p=964178.7\ Pa$

b) $h=98.2853\ m$

Explanation:

Given;

depth of the water-tank, $d=5\ m$

length of the pipe, $l=110\ m$

inclination of the pipe from the horizontal, $\theta =58^{\circ}$

a)

Now the effective vertical height of the water column from the free surface of the water to the bottom of the pipe at house:

$h=d+l.\sin\theta$

$h=5+110\sin58$

$h=98.2853\ m$

Now the pressure due to effective water head:

$p=\rho.g.h$

where:

$\rho=$ density of the liquid, here water

$g=$ acceleration due to gravity

$h=$ height of the liquid column

$p=1000\times9.81\times 98.2853$

$p=964178.7\ Pa$

b)

Now the height of water corresponding to this pressure will be the same as the effective water head by the law of conservation of energy.

$h=98.2853\ m$

6 0

3 years ago

If f = 136 lb , determine the resultant couple moment.

olga_2 [115]

136lb?? I'm so confused rn!! I'm super sorry!!

8 0

4 years ago

Gamma rays can cause cancer, but they can also be used to treat cancer. How

kiruha [24]

Answer:

I think it depends on the purpose of using Gamma rays. It can be both good and bad

5 0

2 years ago

A moving object always has energy in its?

Flura [38]

Answer:

Explanation:

Kinetic and potential energies are found in all objects. If an object is moving, it is said to have kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object.

7 0

3 years ago