Answer:
51.72 cm.
Step-by-step explanation:
We have been given that a pipe that is open at both ends has a fundamental frequency of 320 Hz when the speed of sound in air is 331 m/s. We are asked to find the length of the pipe.
First of all, we will find the wavelength using following formula.
We know that Hz is equal to 
.
Length of the pipe would be half of the wave-length.
Since the length of pipe is in meters, so we will convert it into cm.
1 m = 100 cm
Therefore, the length of the pipe would be 51.72 cm.
This is because the total needs to be equal to 180 degrees. Since obtuse angles are greater than 90 degrees, then it needs an acute angle (lower than 90 degrees) to supplement it to equal 180
Answer:
240 I think.
Step-by-step explanation:
since each side of the cube is 40 cm and there's 6 sides on the cube, you just multiply 40 by 6 to get 240.
Answer:
x = 25
Step-by-step explanation:
(4x - 35) = 180 - 115
4x - 35 = 65
4x = 100
x = 25
Answer:
-9
Step-by-step explanation:
The awnswer to the first equation is -4 and -4-5 is equal to -9
