In which of the following situations does water undergo a change in physical properties?
a. the bathroom fills with steam when you take a hot shower.
b. the neighbor's pond freezes over in winter.
c. water is broken down to yield h2 and o2.
d.
a. and
b. only

Which term best describes the form sound takes as it travels away from a drum (a- gas)(b-music) ( c-waves) (d-particles

Express the following number in scientific notation. 0.026890 =

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided