A piano wire of length 1.5 m vibrates so that one-half wavelength is contained on the string. If the frequency of vibration is 65 Hz, the amplitude of vibration is 3.0 mm, and the density is 15 g/m, how much energy is transmitted per second down the wire?
a. 21 W
b. 11 W
c. 5.4 W
d. 2.2 W
e. 1.1 W
Question 2
Suppose that you were selected for a Survivor-type TV show. To help keep your group connected, you suggest that long vines can be tied together and used to transmit signals in cases of emergency. To get the signals to travel faster, you should
a. select lighter vines.
b. increase the tension on the vines.
c. hang weights from the vines at evenly spaced intervals.
d. do all of the above. e. do (a) or (b) above, preferably both.
A typical bus system showing module CAN communications and twisted pairs of wire.
Gently squeeze along the length of each toe. Move proximal to distal. Squeeze top and bottom first, ...
If toes are curled, straighten them with effleurage along the length of each toe. Use thumb on top ...
(A) A brisk half-moon stroke is an efficient technique to use with the body brush or exfoliation ...
A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ...