- 27. Assume that the cell battery in the circuit you drew puts out 9 V of electricity and the resistances of eachlight bulb is 1.5Q. Each light bulb is also a 9V bulb. 1. Using the rules of ohm's low for series circuits, determine the current (I) of each ligh bulb.Also determine the total resistance of the circuit. (4 morks) Givens: Required: Analysis: Substitution: Statement ii. Since you now know the total al volidge and current of this circuit, determine the Energy consumption of this circuit over 2 hours. Report your results in Wh. (2 mor Givens: Required: Analysis: Substitution: Statement 28. You are shopping for a new stove for your home. You find one with an Energy Star rating o 0.18/kWh how much would it cost you annually? (3 marks) kWh/year.If the cost of electricity in the evening, when this type of device is most often us Givens: Required: Analysis: Substitution: Statement CHEMISTRY (9 marks) -Neatly & clearly answer all questions in the space provided. Page 8 of 12
- __ 2. Why do Mercur and our Moon lack an atmosphere? A planet's . ability to retain an atmosphere depends on __ More massine planets retain their atmospheres because __ need a higher speed to escape . This is known as the __ mass and molecule:atoms mass and temperature and temperature escape inertia atoms and molecules, escape velocity b temperature , molecules. escape velocity c. mass; atoms escape velocity atoms and molecules.mass and temperature ; escape inertia
- his: - Set up quarters so that four are stacked on top of each other. Take another quarter and apply a force with your finger or hand to slide it towards the stack What happens? . What happens when you slide 2 quarters into a stack of 4? . What happens when you slide 4 quarters into 4? . What happen when you slide 4 quarters into 2? ver the following question: . Explain your observations in terms of Newton's 1^st law using force inertia, rest unbalanced forces. exert an outside Porce on the querters that
- this: 1. Without any weight inside, pull the box along the floor. Try to do this with a constant force. Take note on how much force you are using to pull the box car. IN 2. Add an additional mass to the box and pull the cart towards you. Do you notice and change in the amount of force you are applying to move the box? 3. Keep adding more mass and take note of the tension in the string you are pulling and in the force you are applying. Add more weight until the box becomes difficult to pull. 4. Is there a difference in the force needed to get the box to move with more weight added? Explain. __
- PARTIE I: EVALUATION DES RESSOURCES /24 points EXERCICE 1 : Vérification des savoirs / 08 points 1) Définir : système oscillant,vibration 2) Enoncer : a. La loi de Laplace, 3) Soit Theta (t)=Theta _(m)sin(omega t+varphi ) en rad la loi horaire d'un oscillateur harmonique Indiquer les grandeurs physiques qui interviennent dans cette relation et donner leurs unités dans le système international. 2 pts 4) Répondre par vrai ou faux 1pttimes 2 4.1) Dans un mouvement circulaire uniforme, l'accéération tangentielle est nulle 4.2) ) Le rayon de la trajectoire d'une particule chargée dans un champ magnétique uniforme diminue si on augmente sa charge et sa vitesse. b. la 2^tme loi de Newton EXERCICE 2: Application des savoirs / 08 points 1) la quantité de mouvement d'un objet de masse m, en mouvement à la vitesse v est donnée par=mV Déterminer la dimension et I'unité de P 1 pt 2) Une particule électrique de charge q=10^-8C est placée à Yorigine O des coordonnées. a. Représenter le vecteur champ électrique créé par cette particule en un point M de l'espace situé à une distance d du point O. 1 pt b. Calculer le module de ce champ sachant d=10cm. On donne K=9.10^9USI 1 pt Page : 25/31 1pttimes 2 1pttimes 2
