1 The dependent variable would be the amount of liquid absorbed by a paper towel. 2  In an experiment to determine how far people can see into the infrared part of the spectrum, the wavelength of light is the independent variable and whether the light is observed (the response) is the dependent variable.
2. Cook the ribs slowly for 1-1/2 to 2 hours, over medium heat (325Â° to 350Â°) and over a drip pan half filled with water. Long, slow cooking makes for moist and tender ribs with a crisp crust. If in the first 30 minutes the ribs are browning too quickly, shut the grill vents. 3. Determining when pork ribs are done is a little tricky, but after 1-1/2 to 2 hours, you can be virtually certain that the ribs are fully cooked.
The trick to great ribs is to cook them very slowly with the BBQ sauce on them. You can do this in an oven, just set the temperature to 225Â° F (about 107Â° C). I occasionally use an electric smoker, which cooks at about 200 to 225 degrees Fahrenheit.I've also used this method on my gas grill and in my oven.Cook the ribs for 4Â½ to 5 hours.The time it takes you to cook the ribs may vary depending on the true temperature of your grill, oven, or smoker, the temperature of the ribs when you start, and other factors.ook the ribs for 4Â½ to 5 hours. The time it takes you to cook the ribs may vary depending on the true temperature of your grill, oven, or smoker, the temperature of the ribs when you start, and other factors.