Answer in units of RADIANS Two loudspeakers are placed on a wall 2.21 m apart. A listener stands directly in front of one of the speakers, 3.21 m from the wall. The speakers are being driven by a single oscillator at a frequency of 254 Hz. The speed of the sound is 343 m/s. What is the phase difference between the two waves when they reach the observer? Answer in units of rad.

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

Alivestock company reports that the mean weight of a group of young steers is 1100 pounds with a standard deviation of 93 pounds. based on the model n(1100,93) for the weights of steers, what percent of steers weigh a) over 1050 pounds? b) under 1300 pounds? c) between 1150 and 1250 pounds?

Apossible explanation for a set of facts that can be tested by further investigation is called