diff --git a/tube.py b/tube.py
new file mode 100644
index 0000000..5a3d860
--- /dev/null
+++ b/tube.py
@@ -0,0 +1,10 @@
+## Exp W. Modes of long cyclinder (1D) ##
+v = 343 #speed of sound
+L = 0.4 #length of tube
+f = [] #frequencies
+
+for n in range(1,11):
+    
+    f.append((v*n)/(2*L))    
+    print(str(n) + ': ' + str(f[n-1]) + ' Hz')
+