Write an English letter to an American friend to introduce Hangzhou,

Write an English letter to an American friend to introduce Hangzhou,

　　Dear Tom:　　How's it going I heard you are interested in hangzhou ,and I am will to introduce my hometown for you.　　Hangzhou is one of the important touristy cities in China,famous for its natu...

I wrote a letter to my friend in America. I want to write "from China" in the upper right corner?

I am come from China

How much electricity does it take to freeze a bottle of mineral water into ice

According to a bottle of 500ml, namely 500g, the water temperature is 25 ℃
The specific heat of water is 4.18j/g, and the melting heat of ice is 334.4j/g
When the temperature of water decreases from 25 ℃ to 0 ℃, the amount of heat released is as follows:
Q1=CmΔT=4.18×500×25=52250J
When water at 0 ℃ becomes ice at 0 ℃, the heat to be released is as follows:
Q2=C1m=334.4×500=167200J
Therefore, the amount of heat that water needs to release to form ice at 25 ℃ is at least:
Q=Q1+Q2=219450J
When one degree of electricity is consumed by refrigeration, the heat that can be absorbed is: (the energy efficiency ratio is calculated as 1:2.5)
Q3=1KWH×2.5=1000W×3600s×2.5=1000J/s×3600s×2.5=9×10^6J
The minimum power consumption for water ice formation at 25 ℃ is as follows:
W = q / Q3 = 219450 / (9 × 10 ^ 6) = 0.024kwh = 0.024 degree

How many bottles of 2000cc water is equivalent to 600ml mineral water?

One CC is about one milliliter, three bottles plus one third

Star mineral water label What's the meaning of 550ml on mineral water

This ± 5ml refers to plus or minus 5ml, because it is impossible that the volume of each bottle of water is exactly 550ml. There is an error range, that is, the volume of this bottle of water hovers around 550ml, that is, 545ml ~ 555ml

How many grams is 570 ml Jingtian mineral water equal to

The weight of 500 ml water is 1 jin (500 g);
570 ml of Jingtian mineral water equals 570 G

How many milliliters of mineral water is equal to the weight of a kilogram dumbbell?

1000 ml mineral water

A bottle of mineral water, drink 200 ml, drink the remaining 4 / 5, the remaining several ml

Remaining: 200 △ 4 / 5 = 250 (ML)

This kind of mineral water has the following mark "550ml (± ml)". What does this mean?
It's on the math paper

It means that the standard of this bottle of water is 550ml, but it can't guarantee that every bottle of water is 550ml, floating 5ml up and down, that is, between 545 and 555ml, which are all qualified products

Mineral water bottle + lid 1

0000