A construction of the average speed problem. The protractor represented by a semicircle was used to measure the angles with slope values of 17 km/hr, 13 km/hr and 19 km/hr. The horizontal dash line gave the distance fraction 0.255 and the vertical dash line gave the time fraction 0.333. For those who forgot how to construct a graph from math class
Let 20 squares represent 1 hr
Let 20 squares represent 20 km
At the origin, draw a slope of 17 km/hr, rise over run is the slope
At the origin, draw a slope of 13 km/hr
At the end-tip of the 17 km/hr line, draw a slope of 19 km/hr, extend the graph paper when necessary. Then extend the 19 km/hr backward to intersect with the 13 km/hr slope
Then read the intersection coordinates in (x squares, y squares)
Then do ratio x/20, y/20
Then repeat with another set of new numeric information

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

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.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?