The transition from single to multicellular life took over two billion years
Indicate whether the statement is true or false
TRUE
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Write Darcy’s law for permeability processes.
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In order to overcome a surface tension of a fluid, a force of 1.35 × 10^?2 N is required to lift a wire ring of circumference 13.0 cm. What is the surface tension of the fluid?
a. 0.052 N/m b. 0.104 N/m c. 0.552 N/m d. 5.19 N/m e. 17.6 N/m
In Young's double-slit experiment, light was first passed through a narrow single slit before going on to the double-slits. The reason for the first slit was
A. to ensure a constant phase relationship between the interfering light waves. B. to polarize the light. C. to screen out all wavelengths except those in the visible light spectrum. D. to reduce the brightness of the light so the interference pattern could be seen.
An isotope of fluorine has 9 protons and 10 neutrons. What are the atomic number and atomic weight of this fluorine? If we added a proton to this fluorine nucleus, would the result still be fluorine? What if we added a neutron instead? Explain
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