Answer:
Hi Riahroo! This is a good question on the concept of relational databases.
We can normalize the relations as follows:
Flight
(flightnumber (unique), flighttime, airline_id, departure_city, arrival_city, passenger_id, pilot_id, airplane_id)
has_one_and_belongs_to :airline
has_many :passengers
has_one :pilot
Itinerary(passenger_id, flight_id)
Belongs_to
Passenger_details
(passengername (unique), gender, date_of_birth)
has_many :flights
Pilot
(pilotname (unique), gender, date_of_birth)
has_many :flights
airline(airlinename)
airplane(planeID, type, seats))
Explanation:
To normalize a relation, we have to remove any redundancies from the relationships between database objects/tables and simplify the structure. This also means simplifying many-to-many relationships. In this question, we see there is a many-to-many relationship between flights and passengers. To resolve this we can introduce a join table which simplifies this relationship to a one-to-many between the objects.
Answer:
Calculus is a branch of mathematics focused on limits, functions, derivatives, integrals, and infinite series. ... Calculus has widespread applications in science, economics, and engineering and can solve many problems for which algebra alone is insufficient.
Answer: phonegap and xamarin
Explanation:
phonegap and xamarin
The Exhaust stroke.
The exhaust stroke is the final stroke of the four-stroke cycle engine. It occurs when the stroke valve is open and the intake valve is closed as can be seen in the picture above. The piston in this stage moves upwards from BDC to TDC. The exhaust valve opens other moving parts like the wheel which pushes the piston back to TDC. This action emits the spent air-fuel mixture through the exhaust valve.
