When a block of steel at 90 degrees celsius is placed in a bucket of water at 30 degrees celsius, what happens?

question 16 options:

the temperature of the steel increases and the temperature of the water decreases.

the temperature of the steel increases and the temperature of the water increases.

the temperature of the steel decreases and the temperature of the water decreases.

the temperature of the steel decreases and the temperature of the water increases.

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?

Auser is given read permission to a file stored on an ntfs-formatted volume. the file is then copied to a folder on the same ntfs-formatted volume where the user has been given full control permission for that folder. when the user logs on to the computer holding the file and accesses its new location via a drive letter, what is the user's effective permission to the file? a. read b. full control c. no access d. modify e. none of the above

To add additional commands to the quick access toolbar, a user can navigate to the view. backstage status bar design file