3. A chemist attempts to determine the surface tension of various detergent-containing liquids by using a tensiometer. In determining the accuracy of the instrument, the chemist tests the
surface tension of pure water and obtains a value of 71.28 dynes cm. The standard value for
surface tension of pure water is 71.97 dynes cm. What is the percent error of the tensiometer?
pls. explain and tell ansrew

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

Which are causes of mechanical weathering? (check all that apply) a. acid rain b. plant growth c. animal actions d. carbon dioxide e. pressure release i chose b & e and got the question wrong.

Astronomers studying the planet of rhombus have detected sedimentary rock on its surface. one astronomer wonders if material in this sedimentary rock used to be in igneous rock deep in rhombus’s interior. can igneous rock become sedimentary rock? explain your answer.