The contact angle for a water droplet on wax is 112°. Assume that the surface tension for wax 0.023 N/m. What is the value of the interfacial tension between water and wax at 25°C?
What will be an ideal response?
From Table 3.2 the surface tension of water is 0.072 N/m. Inserting the known values into Young’s equation results in:
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Buoyancy: An object floats with half its volume beneath the surface of the water. The weight of the displaced water is 2000 N. What is the weight of the object? The density of water is 1000 kg/m3.
A. 1000 N B. 2000 N C. 4000 N D. It cannot be determined because we do not know the volume of the object.
A(n) ______ is data or information presented visually, such as in a chart or pyramid.
A. infographic B. carousel C. clip art D. animation
The thermal pressure of a gas depends on
A) density only. B) temperature only. C) density and temperature. D) composition. E) gravity.
What is the most abundant element in Earth's crust? What is the second most abundant element?
What will be an ideal response?