A test tube has a diameter of 3cm how many turns would a piece of thread of length 90.42cm make round the test tube

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

From the perspective of an employee that effective channeling of work related information and concerns

If you put a helium-filled balloon in the refrigerator, what will happen?