1. Determine the difference in pressure between the inside and outside of a soap film bubble at 20 C if the diameter of the bubble is 4 mm. 2. An open, clean glass tube, having a diameter of 3 mm, is...

1. Determine the difference in pressure between the inside and outside of a soap film bubble at 20C if the diameter of the bubble is 4 mm.

2. An open, clean glass tube, having a diameter of 3 mm, is inserted vertically into a dish of mercury at 20C. Determine how far the column of mercury in the tube will be depressed for a contact angle of 130.