elishaheart21

15.01.2020 • 

Engineering

Consider the following mysql table definition: create table tblitems(x char(3));
which of the following is a valid insert statement? selected: a. insert into tblitems(x) values(‘yes’, ’no’); this answer is correct.b. insert into tblitems(y) values(‘yes’, ’no’); c. insert into tblitems(y) values(‘no’); d. insert into tblitems(y) values(‘wrong’)

Ответ:

isiss18

11.12.2020

Engineering

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a) 22.5number

b) 22.22 m length

Explanation:

Given data:

Bridge length = 500 m

width of bridge = 12 m

Maximum temperature = 40 degree C

minimum temperature  = - 35 degree C

Maximum expansion can be determined as

where , \alpha is expansion coefficient degree C

SO,

number of minimum expansion joints is calculated as

b) length of each bridge

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