Which statement correctly compares seismic p-waves with seismic s-waves ?

a. p-waves travel faster than s-waves and do not pass through earth's liquid zones.
b. p-waves travel slower than s-waves and dont not pass through earth's liquid zones.
c. p-waves travel slower than s-waves and pass through earths liquid zones .
d. p-waves travel faster than s-waves and pass through earth's liquid zones .

The answer is; D.

P-waves are compressional waves while S-waves are shear waves. P-waves are recorded first by seismographs before S-waves because they travel faster. The time difference in arrival between the P and S waves can be used to calculate the epicenter of an earthquake. S-waves are not able to be transmitted via liquid and gases, unline P-waves which pass through all media.

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy