### ВУЗ:

Составители:

Рубрика:

48

Fill in the gaps in the solution with the following words:

cost, mass, heat, times, month, corresponds, change, express

Firstly, I would like to find out how much a) ……… it takes to heat a

bathtub. According to the equation the heat needed to b) ……… the temperature

is the c) ……… of water times specific heat d) ……… the temperature change

(H = mc ∆T) = 80 kg ⋅ (1.0 kcal / kg ⋅ °C) ⋅ ( 42 – 12) °C = 2400 kcal. Thus we

get 2400 kcal. Now I have to e) ……… heat in energy units called Kilowatt –

hours. Each kilocalorie f) ……… to 0.00116 kWh, so if we multiply 2.400 by

0.00116, this amount of heat will be 2.8 kWh. At 10 ¢ per kWh the g) ………. Is

2.8 ⋅ 10 ¢ = 28 ¢. For four people taking a bath a day for one h) ……… it would

cost 4 ⋅ 30 ⋅$ 0.28 = $ 33.60 to heat water.

17. Equal amounts of heat are added to equal masses of aluminum and

copper at the same temperature. Which metal will have a higher final

temperature? Put together the beginnings and ends of the sentences to

explain how you have solved the problem.

1. First, we must find out a) the amount of heat required to raise

its temperature

2. The table of specific heat b) 0.22 by 0.92 to get 2.5

3. Then we should point out that the

greater the specific heat of a substance,

the greater is

c) 2.5 times more heat than cooper

4. Finally we should divide d) the specific heats of these metals in

the table

5. It means that aluminum needs e) 2.5 times greater than aluminum

6. Copper will have a final temperature

f) gives 0.22 kcal / kg for aluminum

and 0.092 kcal / kg for copper

18. Catherine has thrown caution to the wind eating too much ice cream

and cake. Now she is worried about her extra calories. Read the

conversation between Bill and Catherine filling the words from the list:

calculations, convert, divided, weight, height, extra calories, climb, to

calculate, gravity

C: I wish I hadn’t eaten so much ice cream and cake. I’m afraid I’ll put on a lot

of weight a) ……… after this party.

B: Stop worrying. I think I can help you. How many b) ……… have you got?

C: I’ve overeaten by about 500 Calories.

B: And what’s your total weight?

C: About 60 kg.

B: Let me think, my c) ……… show that you must climb a vertical d) ……… of

3600 m to work these calories off.

48 Fill in the gaps in the solution with the following words: cost, mass, heat, times, month, corresponds, change, express Firstly, I would like to find out how much a) ……… it takes to heat a bathtub. According to the equation the heat needed to b) ……… the temperature is the c) ……… of water times specific heat d) ……… the temperature change (H = mc ∆T) = 80 kg ⋅ (1.0 kcal / kg ⋅ °C) ⋅ ( 42 – 12) °C = 2400 kcal. Thus we get 2400 kcal. Now I have to e) ……… heat in energy units called Kilowatt – hours. Each kilocalorie f) ……… to 0.00116 kWh, so if we multiply 2.400 by 0.00116, this amount of heat will be 2.8 kWh. At 10 ¢ per kWh the g) ………. Is 2.8 ⋅ 10 ¢ = 28 ¢. For four people taking a bath a day for one h) ……… it would cost 4 ⋅ 30 ⋅$ 0.28 = $ 33.60 to heat water. 17. Equal amounts of heat are added to equal masses of aluminum and copper at the same temperature. Which metal will have a higher final temperature? Put together the beginnings and ends of the sentences to explain how you have solved the problem. 1. First, we must find out a) the amount of heat required to raise its temperature 2. The table of specific heat b) 0.22 by 0.92 to get 2.5 3. Then we should point out that the c) 2.5 times more heat than cooper greater the specific heat of a substance, the greater is 4. Finally we should divide d) the specific heats of these metals in the table 5. It means that aluminum needs e) 2.5 times greater than aluminum 6. Copper will have a final temperature f) gives 0.22 kcal / kg for aluminum and 0.092 kcal / kg for copper 18. Catherine has thrown caution to the wind eating too much ice cream and cake. Now she is worried about her extra calories. Read the conversation between Bill and Catherine filling the words from the list: calculations, convert, divided, weight, height, extra calories, climb, to calculate, gravity C: I wish I hadn’t eaten so much ice cream and cake. I’m afraid I’ll put on a lot of weight a) ……… after this party. B: Stop worrying. I think I can help you. How many b) ……… have you got? C: I’ve overeaten by about 500 Calories. B: And what’s your total weight? C: About 60 kg. B: Let me think, my c) ……… show that you must climb a vertical d) ……… of 3600 m to work these calories off.

## Страницы

- « первая
- ‹ предыдущая
- …
- 46
- 47
- 48
- 49
- 50
- …
- следующая ›
- последняя »