2. If a solution of KNO, has 80 g/100 of
water at 70 °C, what is its saturation?
Unsaturated, saturated, or
supersaturated?

3. Which substance does not follow the
trend of increasing solubility with a rise
in temperature?

4. According to what you've read, why is
this probably the case for this substance?

5. If there is 140g of KI per 100 g of water and the solution is saturated, what must it’s temperature be?

6. How would you make a supersaturated solution of KClO3?

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?