Marcos took a 100-cm cubed sample of suspension, shook it well, and poured equal amounts into four different test tubes. he placed one test tube in a rack, one in very hot water, one in warm water, and the fourth in ice water. he then observed the time it took for each suspension to settle. what was the variable in the experiment? what was the one constant.

The variable of the experiment was:

The constant of the experiment was:

Explanation:

First I want you to identify very well what a constant is and what a variable is, a constant is something that remains the same at different stages of the experiment or in different experiments (for example in this case the same amount of the same material in suspension was used), while a variable is something that is modified at each stage of the experiment (as you could notice, cold, warm and very hot water was used, as well as water at room temperature, so their temperatures were different).

wavelength variability is the right one

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.