Welcome to PHYS 111 SI EXAM 3 REVIEW

Welcome to PHYS 111 SI EXAM 3 REVIEW APRIL 8 TH, 2018 PLEASE SIGN IN AT THE FRONT AS YOU ARRIVE

Form groups of 3/4, Introduce yourself WHAT IS YOUR NAME? WHAT IS THE PROPER WAY TO HAVE TOILET PAPER ON A ROLL?

Exam 3 Tuesday, April 10 th 8: 15 PM (Same time and place as Exam 2) Through SI, you could have dedicated 14 additional hours to success in Physics 111 since the second exam Topics on Exam: ◦ ◦ ◦ ◦ Rotational Energy and Angular Momentum Gravity Oscillations Waves and Sound Interference Static Fluids Fluid Dynamics I cannot promise that we will cover everything that you need to know for your exam, so keep studying!

Any questions? IF NOT, WE WILL BEGIN

Question 1 A flywheel is a rotating mechanical device used to store mechanical energy. Given the characteristics at right, what is the top angular speed of the flywheel? https: //physics. info/rotational-energy/practice. shtml

Question 2 A satellite wishes to orbit the earth at a height of 100 km above the surface of the Earth. What is the orbital period of the satellite?

Question 3 A 4 kg mass attached to a spring is observed to oscillate with a period of 2 seconds. What is the period of oscillation if a 6 kg mass is used instead?

Question 4 During a Variety Show practice, Kip plucked a string on his guitar, sending vibrations in both directions. The string is pulled to a tightness of 220 N and has a mass density of 13 g/m. If the string is 60 cm long, what is the frequency of the vibration on the string?

Question 5 An 80 cm closed-end air column is forced to vibrate in its fifth harmonic. What are the locations of the nodal positions relative to the figure below? Note the closed end is at 0 cm.

Question 6 As shown in the diagram, person A driving a car with speed 17 m/s hears a siren sound with frequency 737 Hz at a distance of 141 m behind him coming from an ambulance chasing his car with speed 34 m/s. What is the approximate frequency of the siren sound heard in the ambulance?

Question 7 Two speakers are mounted on a wall and are separated by 5. 25 m. An observer is standing 40 m from the wall, directly in front of one of the speakers. Both speakers are driven by the same source, so the sound emitted from the speakers is in-phase. If the speakers are driven at 1. 5 k. Hz, does the observer hear a quiet, loud, or intermediate sound?

Question 8

Question 9 Water flows through a pipe of radius 8. 0 cm with a speed of 10 m/s. It then enters a smaller pipe of radius 3 cm and magically turns into vegetable oil with a density of 0. 91 g/cc. What is the speed of the oil as it flows through the smaller pipe?

Question 10 A hose lying on the ground has water coming out of it at a speed of 5. 4 m/s. You lift the nozzle of the hose to a height of 1. 3 m above the ground. At what speed does the water now come out of the hose?

Any questions? IF ANYTHING IS NOT CLEAR, NOW IS THE TIME TO ASK