You will now use graphical analysis to calculate the slope of the line. choose analyze from the menu. select automatic curve fit. select the proper stock function from the list. (hint: your answers from question 1 should you make the proper selection.) just below the graph you will see the slope value. remember that the symbol for slope is "m." when you choose ok to get back to the regular graph screen, you will see a little box on the graph. this box also shows the slope value. (remember that slope is "m.") if you are unable to use graphical analysis, you can also graph your data on paper to determine the slope. hint: to determine the slope, use the formula m = (y2 - y1) ÷ (x2 - x1). what is the numerical value of the slope of the line? show your work.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?