If the half-life of a decaying isotope is 10 years, which statement is true after 10 years? A. there are more parent nuclei than daughter nuclei in a sample
B. The relative numbers of atoms cannot be determined
C. There are more daughter nuclei than parent nuclei in a sample
D. The numbers of parent nuclei and daughter nuclei in a sample are equal

Which of the following statements are true of solids? a. the particles do not vibrate. b. the particles are in a fixed location. c. they have strong intermolecular forces between the atoms or molecules. d. the particles have less kinetic energy than those of liquids or gases.

If forces acting on an object are unbalanced. true or false

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.