Student groups are given an unknown liquid to test using the four indicators. one group conducts the tests and records these results. color changes - ph indicators indicator used color produced methyl violet bluish bromophenol blue yellow phenolphthalein colorless thymolphthalein colorless using the table of indicator values, determine the approximate ph of the unknown solution. a) 1.6 b) > 3.0 c) between 0 and 1.6 d) between 1.6 and 3.0

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.

Which wave would cause destructive interference at every point of the wavelength and completely cancel out the wave?