Crowdly
Add to Chrome
CC - P2 - Promo 2028
Looking for CC - P2 - Promo 2028 test answers and solutions? Browse our comprehensive collection of verified answers for CC - P2 - Promo 2028 at moodle.myefrei.fr.
Get instant access to accurate answers and detailed explanations for your course questions. Our community-driven platform helps students succeed!
Temps estimé: 3 minutes
Pour une onde électromagnétique plane sinusoïdale progressive se propageant dans le milieu air, les expressions des vecteurs champs électrique et magnétique en notation complexe permet de déduire que: et avec le vecteur d'onde et la pulsation.
Dans ce cas, on déduit que l'équation de Maxwell-Ampere peut s'écrire:
Estimated time: 2 minutes
We consider an electromagnetic progressive plane wave propagating in air/vacuum. The expression of the electric field associated to this wave is:
The expression of the magnetic field associated to this wave is:
Estimated time: 3 minutes
For an electromagnetic sinusoidal progressive plane wave propagating in air medium, The expressions of the electric and magnetic fields in complex notation allows to deduce that: and with the wave vector and the angular frequency.
In this case, Maxwell-Ampere equation can be written:
Temps estimé: 3 minutes
On considère une onde électromagnétique qui se propage dans le milieu air. Pour une fréquence f= 1 GHz, on peut déduire que :
Temps estimé: 2 minutes
L'équation de propagation du champ magnétique associée à une onde électromagnétique se propageant dans le milieu air est:
QUESTION
Quelle requête permet de récupérer tous les employés avec un salaire supérieur à 50000 ?A) SELECT * FROM Employee GROUP BY Salary >= 50000;B) SELECT Salary FROM Employee WHERE Salary >= 50000;C) SELECT * FROM Employee HAVING Salary >= 50000;D) SELECT * FROM Employee WHERE Salary >= 50000;
Relational Schema
Employee (EmployeeID, FirstName, LastName, Email, Phone, HireDate, Salary, #DepartmentID)Department (DepartmentID, DepartmentName, #ManagerID)Project (ProjectID, ProjectName, StartDate, EndDate, Budget)Employee_Project (#EmployeeID, #ProjectID, Role, AssignmentDate)
Explanation of Relationships:
- Employee (EmployeeID) is the primary key.
- Department (DepartmentID) is the primary key.
- Project (ProjectID) is the primary key.
- Employee_Project (#EmployeeID, #ProjectID) is a composite primary key (many-to-many relationship between Employee and Project).
- Employee(#DepartmentID) REFERENCES Department(DepartmentID): An employee belongs to a department.
- Department(#ManagerID) REFERENCES Employee(EmployeeID): A manager is an employee.
- Employee_Project(#EmployeeID) REFERENCES Employee(EmployeeID)
- Employee_Project(#ProjectID) REFERENCES Project(ProjectID)
SELECT * FROM Employee INNER JOIN Department;B) SELECT Employee.FirstName, Employee.LastName, Department.DepartmentName FROM Employee JOIN Department ON Employee.DepartmentID = Department.DepartmentID;C) SELECT FirstName, LastName FROM Employee, Department;D) SELECT Employee.FirstName, Employee.LastName, Department.DepartmentName FROM Employee RIGHT JOIN Department;