QUESTION 6     Resistors are included in circuits that are used as potential dividers.         (a) Derive an equation for the combined resistance RT for two resistors, R1 and R2, in series. (3)       (b) The diagram (see addendum) shows a circuit that includes a resistor combination. The battery has negligible internal resistance.     The ammeter displays a current of 0.50 A. Calculate the resistance R. (3)       (c) The circuit shown (see addendum) includes a light dependent resistor (LDR). The battery has no internal resistance.   (i) In normal daylight, this particular type of LDR has a resistance of 670 Ω. Calculate the power dissipated in the fixed resistor in normal daylight. resistance of fixed resistor = 8.00 kΩ      (3) (ii) As the light intensity incident upon the LDR decreases, the power dissipated in the fixed resistor decreases. Explain why the power in the fixed resistor decreases. Your answer should include reference to the electrons in the LDR. (4)

  QUESTION 2   Which electrical component has the current-potential difference graph shown?         A    diode B    filament lamp C    resistor D    thermistor

Répondez aux questions ci-dessous avec des propositions complètes. 100 POINTS ô  é  è  ê  à  â  ç  ï  î  ù  û  œ É  È  Ê  À    Ç  Π Ù   1. Quel est le rôle de l’Église dans les écoles publiques françaises ? 2. Nommez une similarité entre les écoles privées et les écoles publiques en France. 3. Dans quel mois commence l’école en France ? 4. Quels sont les jours de la semaine quand les élèves français restent à la maison ? 5. De quelle heure jusqu’à quelle heure restent les élèves français à l’école de lundi à vendredi ? 6. Nommez 3 vacances des élèves français. 7. VRAI ou FAUX: L’école maternelle est obligatoire en France. 8. Combien d’années dure l’école primaire en France ? 9. Quel examen passent les élèves français à la fin du collège ? Qu’est-ce que c’est le CAP?   Notation: réponse incorrecte/manquante              = -10 points verbe incorrect                                           = -1 point erreur autre que le verbe                          = – 0.5 point

A molecule that contains both hydrophilic and hydrophobic sections is called a(n) ___________ molecule.

In terms of tonicity, ________ refers to a situation where the outside of the cell has the same solute concentration as the inside of the cell.

 Find linearization of  at  and use it to estimate .

Find and classify all critical points of the function  

Sketch level curves of the following function: 

Write the code that creates a Random object and then assigns a random integer in the range of 1 though 100 to the variable, randomNumber. 

Trying to decide between three alternatives, a company employed a scoring model. Three criteria were chosen. Criteria A was believed to be the most important and so was given a weight of 50%. The other two were deemed to be equal to each other in importance. A relative scoring range of 0 to 10 was used. The table below shows each alternative and their scores. Which alternative should the company choose? Criteria         Alternative A             Alternative B                Alternative C     A                    5                                  6                                    7     B                    8                                  7                                    7     C                    8                                  8                                    5