Which of these is a mixture of compounds?
a) sodium (na) and magnesium (mg)
b) lithium (li) and table salt (nacl)
c) co2 and ch4
d) hydrogen (h2) and oxygen (o2) combining to make water h2o

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates