- Use the following information to answer the next 4 questions. As part of the Town of Slave Lake's Riverboat Daze relay race, swimmere must cross the Lesser Slave River. Where the swimmers must cross.the Lesser Slave River has a velocity of 1.50m/s [E]. The river is 60.0 m wide at the point where the -owimmoro-orooe 9. If a fast swimmer with a swim velocity of 3.00m/s[N] attempts to cross the river. what is his her resultant ground velocity? a) 3.35m/s[60.0^nEofN] b) 3.35m/s[26.6^circ NofE] c) 3.35m/s[30.0^circ EofN] d) 3.35m/s[26.6^circ EofN] 10. How long will it take a fast swimmer with a swim velocity of 3.00m/s[N] to cross the river? a) 17.9 s b) 26.1 s c) 23.1 s d) 20.0 s 11. If a slower swimmer with a maximum swim speed of 2.00m/s wished to swim straight south across the river, what should be the swimmer's heading? a) 48.6^circ W b) 38.9^circ W of s c) 41.4^circ W of S d) 45.0^circ W of S 12. How long will it take the slower swimmer to travel directly south across the river? a) 40.0 s b) 45.4 s c) 24.0 s 13. A cement-mixing bucket rolls off the top of a 65.0-m building with a horizontal velocity of 1.25m/s How far from the base of the building will the mixing bucket strike the ground? a) 6.69 m b) 4.55 m c) 16.6 m d) 65.0 m
- Pneumatic tires are filled with air. True False
- Driving a vehicle at speeds greater than the speed rating of the tires can cause the tire to come apart? True False
- Un petit d'enfant est monté en série avecun avec un jouet ohmique de résistance (1)/(2) (1)/(2) (1)/(2) (1)/(2) (1)/(2) (1)/(2) frac { , une conducteur E=4,5V : résistance interne r=1,5V pile npèremètre de résistance négligeable et un interrupteur K. 1- Fais le schéma du montage. 2- Lorsqu'on ferme I'interrupteur,le moteur se met à tourner et l'ampèremètre indique un courant d'intensité I=0,45A Déduis une relation numérique entre la f.c.é.m. e'du moteur (en V) et sa résistance r'(enOmega ) 3- On empeche le moteur de tourner et on note la nouvelle valeur de l'intensité: I'=0,82A Déduis les valeurs numériques , en unités S.I de r'et de E' 4-Détermine , pour une durée Delta t=5 min de
- The frequency of a sound wave is 457 Hz. What is the period? a 0.0032 s b 0.078 s 0.0010 s d 0.0022 s
