Which of the following is true about acids?
a. acids give foods a bitter taste.
b. aqueous solutions of acids conduct electricity.
c. acids have a ph value greater than 7.
d. all of the above

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

Give one example of a pure (exact) number and of an estimated (measured) number.