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3 years ago

What factors might affect how the watermill works?

2 answers:

7 0

<span>Since a watermill is powered by a water wheel the strength of the current and volume of the water passing the mill may alter the amount of power provided. Seasonal and climatic changes could contribute to changes in the current.</span>

erastova [34]3 years ago

4 0

Answer:

Watermill is an energy generating turbine that runs by water. The energy generation of a windmill is dependent upon several factors like efficiency of blades of wind turbine, wind speed and consistency of wind. The energy output of a taller wind turbine is more because wind speeds are greater at higher altitudes.

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Determine the amount of time for polonium-210 to decay to one fourth its original quantity. The half-life of polonium-210 is 138

ira [324]

Answer: 276 days

Explanation:

This problem can be solved using the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=\frac{1}{4}A_{o}$ is the final amount of the material

$A_{o}$ is the initial amount of the material

$t$ is the time elapsed

$h=138 days$ is the half life of polonium-210

Knowing this, let's substitute the values and find $t$ from (1):

$\frac{1}{4}A_{o}=A_{o}2^{\frac{-t}{138 days}}$ (2)

$\frac{A_{o}}{4A_{o}}=2^{\frac{-t}{138 days}}$ (3)

$\frac{1}{4}=2^{\frac{-t}{138 days}}$ (4)

Applying natural logarithm in both sides:

$ln(\frac{1}{4})=ln(2^{\frac{-t}{138 days}})$ (5)

$-1.386=-\frac{t}{138days}ln(2)$ (6)

Clearing $t$ :

$t=276days$ (7)

7 0

3 years ago

One way to ensure that the race ends up in a tie is to have the person who lost the original race run a shorter distance before

Vikki [24]

Answer:

The appropriate answer is "72.8 m".

Explanation:

Let the distance be "x".

As per the question, we get

⇒ $T_{Mia}=T_{Brandi}$

or,

⇒ $\frac{x}{13} +\frac{x}{7}=\frac{\80}{10} +\frac{80}{10}$

By taking L.C.M, we get

⇒ $\frac{20x}{91}=16$

By applying cross-multiplication, we get

⇒ $20x=1440$

⇒ $x=\frac{1456}{20}$

⇒ $=72.8\ m$

6 0

3 years ago

What are some of the impact of modern communication in our socio-economic life?

givi [52]

Answer:

Modern communication has made our socio-economic life so much better and easier. It is easier now to communicate with someone far away on another continent and even do business and shop online without been physically present at the other end. One of the most important modern means of communication is the internet which has turned the world to a small global village.

6 0

3 years ago

Why do sound waves move faster through the ground than through the air? a. Particles of matter are packed more loosely in the gr

lbvjy [14]

B. is it i just got done this in class like two weeks ago hope it helps

5 0

3 years ago

Read 2 more answers

How are frequency and wave period Related?

exis [7]

The frequency and period of any wave are reciprocals.

Frequency = 1/period and Period = 1/frequency .