When two sound waves are out of phase by ____, destructive interference will occur
a. 20°
b. 120°
c. 900°
d. 720°
e. 950°
c
You might also like to view...
A string is wrapped tightly around a fixed pulley that has a moment of inertia of 0.0352 kg ? m2 and a radius of 12.5 cm. An object of mass of 423 g is attached to the free end of the string
With the string vertical and taut, the object is gently released so it can descend doe to the gravitational force exerted on it by Earth. As the object descends, the string unwinds and causes the pulley to rotate, but does not slip on the pulley. What is the speed of the object after it has fallen through 1.25 m? A) 2.00 m/s B) 2.28 m/s C) 1.97 m/s D) 3.94 m/s E) 4.95 m/s
A 2-hp motor can do the same amount of work as a 1-hp motor in ______________ the time. n
Fill in the blank(s) with correct word
The hydrogen in the universe was formed by the energy of the Big Bang
a. True b. False Indicate whether the statement is true or false
Of the temperature ranges below, which range represents the smallest range of actual temperature?
A) 50-100° Kelvin B) 50-100° Celsius C) 50-100° Fahrenheit D) They all represent the same change in temperature.