A1.0 g sample of food reacts with oxygen in a calorimeter containing containing 500 g of water. the temperature rises 10c what is the energy content of the food?
a. 20.92 calories/g
b. 18.25 calories/g
c. 5 calories/g
d. 50 calories/g

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?