Which of the following might a cement mason or concrete finisher be responsible for? (Select all that apply).

A heating system must maintain the interior of a building at TH = 20 °C when the outside temperature is TC = 2 °C. If the rate o

nasty-shy [4]

Answer:

a) $Q_H=16.4kW$

b) $w=5.467$

c) $w=1.2345$

Explanation:

From the question we are told that:

Interior temperature $TH = 20 °C$

outside temperature is $TC = 2 °C$

Rate $H=16.4kW$

a)

Generally electric resistance heating is the heat transfer from interior building

Therefore

$Q_H=R$

$Q_H=16.4kW$

b)

COP =3

Generally the equation for coefficient of performance is mathematically given by

$COP=\frac{Q_H}{w}$

Therefore

$w=\frac{Q_H}{COP}$

$w=16.4/3$

$w=5.467$

c)

Generally the equation for coefficient of performance is mathematically given by

$COP_r=\frac{TH}{TH-TC}$

$COP_r=\frac{20+273}{(20+273)-(2+273)}$

$COP_r=16.2$

Therefore

$w=1.2345$

$w=20/16.2$

$w=1.2345$

5 0

2 years ago

Tony works as a Sorter in a processing factory. Which qualifications does he most likely have?

svp [43]

Answer:

answer is B

Explanation:

7 0

2 years ago

Read 2 more answers

7. What is the voltage across a 100 ohm circuit element that draws a current of 1 A?

Marianna [84]

Answer:

100 V

Explanation:

V = IR

100 x 1 = 100

100 volts

3 0

3 years ago

Choose the best data type for each of the following so that any reasonable value is accommodated but no memory storage is wasted

stiks02 [169]

Answer:

Explanation:

Part (a):

Statement : The number of siblings you have

Suitable Data type : Byte

Typical Value : From -128 and up to 127

Explanation: Byte data type is the most suitable since it can covers minimum and maximum number of siblings one can have.

Part (b):

Statement : Your final grade in this class

Suitable Data type : Char

Typical Value : 1 byte

Explanation: Grades is in the form of alphabetical letter which is either A, B, C, D, F or E which can be stored in character data type.

Part (c):

Statement : Population of Earth

Suitable Data type : Long

Maximum Value : 9223372036854775807

Explanation: Long Data takes up to 8 bytes and can store up to 9223372036854775807 which can cater for more than 36 billion. The population of earth is only around 7 billion currently making Long data type the most suitable data type to store earth population.

Part (d):

Statement : Population of US Country

Suitable Data type : Integer

Typical Value :2147483647

Explanation: Integer data type takes up to 4 bytes and can store up to 2147483647 making it suitable to store U.S population.

Part (e):

Statement : The number of passengers on bus

Suitable Data type : Byte

Typical Value :From -128 up to 127

Explanation: The typical maximum number of passengers of a bus are only around 72. Byte data type is the most suitable since it can cater the number up to 127.

Part (f):

Statement : Player's score in a Scrabble game

Suitable Data type : Short

Typical Value : 32767

Explanation: The maximum point can be scored in the Scrabble game is only 830 therefore the most suitable data type for this case is the short data type.

Part (g):

Statement : One team's score in a Major League Baseball game

Suitable Data type : Byte

Typical Value : From -128 up to 127

Explanation: The maximum point can be scored in the Base ball game is only 49 therefore the most suitable data type for this case is the Byte data type since it can cater up to 127.

Part (h):

Statement : The year an historical event occurred

Suitable Data type : Short

Maximum Value: 32767

Explanation: The historic event year can be any number from 1 to 2020 therefore the most suitable data type is the short data type.

Part (i):

Statement : The number of legs on an animal

Suitable Data type : Short

Maximum Value: 32767

Explanation: The most number of legs found are 750 legs therefore the most suitable data type is the short data type which can cater up to 32767.

Part (j):

Statement : The Price of an automobile

Suitable Data type : Float

Maximum Value: 340282350

Explanation: The most expensive car is around 15 million therefore the most suitable data type is the float data type which can cater up to 340 million.

3 0

3 years ago

A master stud pattern is laid out somewhat<br> like a?

Svetradugi [14.3K]

Answer:

••• like a story pole but has information for only one portion of the wall. system. methods and materials of construction.

3 0

2 years ago