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dybincka [34]
4 years ago
11

HELP HELP !!! WILL MEDAL

Physics
1 answer:
makkiz [27]4 years ago
5 0

The two most common ways are the use of a water restrictor in the shower head, most of the heads in the U.S.A are equipped with a water restrictor. Secondly, the commode water tanks have been made smaller using less water per flush. Some conservation of water may be gained by using "instant" water heaters in the shower/bath and basin rather than a hot water tank type heater. Locating an instant water heater near the output of the water reduces the need to let the water run until it becomes hot at the output. I hope that this is the answer that you were looking for and it has helped you.


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When a 100-Ω resistor is connected across the terminals of a battery of emf ε and internal resistance r, the battery delivers 0.
gladu [14]

Answer:

The emf and internal resistance of the battery are 9 volt and 2.04 Ω

Explanation:

Given that,

First resistorR = 100\ \Omega

PowerP = 0.794\ W

Second resistorR=200\ \Omega

PowerP=0.401\ W

We need to calculate the emf and internal resistance

Using formula of emf

P=\dfrac{e^2}{R+r}

For first resistor

0.794=\dfrac{e^2}{100+r}....(I)

For second resistor

0.401=\dfrac{e^2}{200+r}.....(II)

From equation (I) and (II)

\dfrac{795}{401}=\dfrac{200+r}{100+r}

Using component of dividend rule

\dfrac{393}{401}=\dfrac{100}{100+r}

r =2.04\ \Omega

Now, Put the value of internal resistance in equation (I)

0.794=\dfrac{e^2}{100+2.04}

e^2=0.794(100+2.04)

e=\sqrt{0.794(100+2.04)}

e=9\ volt

Hence, The emf and internal resistance of the battery are 9 volt and 2.04 Ω

5 0
3 years ago
An elevator is moving upward at 0.91 m/s when it experiences an acceleration 0.31 m/s2 downward, over a distance of 0.61 m. What
alexgriva [62]

Given:

u= 0.91 m/s

a=0.31m/s∧2

s= 0.61 m

s = ut +1/2(at∧2)

where s is the displacement of the object

u is the initial velocity

t is the time

a is the acceleration

Substituting the values

0.61=0.91×t +(0.31 ×t∧2)/2

0.61=0.91 t + 0.155 t∧2

t=0.61 secs

Consider the equation

<u>v=u +at </u>

where v is the initial velocity

u is the initial velocity

a is the acceleration

t is the time

Substituting the values we get

v= 0.91 +(0.31×0.61)

v= 1.099 m/s


3 0
4 years ago
Please help me thank you !!!!
Fantom [35]

Answer:

<em>UP</em>

Explanation:

heat flows from higher level to lower level

( higher concentration to lower concentration )

and since temperature in above block is less than the lower block, the heat will flow from lower block to higher block .

( Up )

5 0
3 years ago
What is the target heart rate for a 24 year old?
andriy [413]

Answer:

196

Explanation:

subtract 24 from 220 to get your answer.

6 0
3 years ago
Read 2 more answers
Which of the following is a complex machine? 1) piano 2) bottle opener 3) shoehorn 4) doorknob
xeze [42]
1. piano. that is the answer is my mind
5 0
4 years ago
Read 2 more answers
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