What is meant by radioactivity? high-energy subatomic particles
disintegration of the nucleus
unstable atoms
all of the above

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f