Answer:
The expression is :
π[cd) + π(g,h) ],[π(e,f)+π(a,b)])
We will use foreign key and primary key
Answer:
200 nm
Explanation:
We need a constructive interference to see the bright reflection
we know that 
where m=1 and 
is the wavelength of the gasoline
so 
putting the value of m and in thickness equation
so the thickness of the film will be 200 nm
Answer:
A) True
Explanation:
Java provides collections architecture or framework used to store and manipulate a group of objects or collections.
The collection framework has interfaces which include; Set, Queue, Deque, List, as well as classes which include; Hashset, ArrayList, LinkedList, LinkedHashset, PriorityQueue, Vector and TreeSet.
There are also many methods declared in the collection interface which include; add(), addAll(), remove(), removeAll(),retainAll(), clear(), size(), iterator(), toArray() etc
Answer:
Computer hardware engineer
Systems analyst
Database administrator
Answer:
a.the number of cycles per second
Explanation:
The frequency of a sine wave is defined as the number of cycles per second.
Frequency is the inverse of the time period. The frequency of a sine wave is given by 1/TimePeriod . It is generally expressed in units of Hertz(Hz) or sec^-1. Larger the time period, lower will be the frequency and vice versa. So for higher frequency waves we need to ensure that the time period is small.
