physics 122 – class #10 date: 9/9/15kestrel.nmt.edu/~saska/class10-notes.pdf · physics 122 –...
TRANSCRIPT
Announcements/Reminders
MP HW03 – Due today, by 11:59 pm.
Written HW#3 – Due Monday, 9/14/15 by 9am.
Start preparing for exam!
Make sure you are doing the reading assignments.
Check the website regularly to make sure of assignments and due dates.
Kestrel.nmt.edu/~saska/phys122.html
Example:Problem 21.38 (text)A violinist places her finger so that the vibrating section of a 1.0 g/m string has a length of 30.0 cm , then she draws her bow across it. A listener nearby in a 20 C room temperature hears a note with a wavelength of 40.0 cm. What is the tension in the string?
Example:Problem 20.26 (text)Two outofphase radio antennas at x=±300m on the xaxis are emitting 3.0MHz radio waves. Is the point(x,y)=(300m,800m) a point of maximum constructive interference, perfect destructive interference, or something in between?
Example:Problem 21.11 (text)
A heavy piece of hanging sculpture is suspended by a 90 cmlong, 5.0 g steel wire. When the wind blows hard, the wire hums at its fundamental frequency of 80 Hz . What is the mass of the sculpture?