London and New York are moving farther apart each year at about the same rate that fingernails grow, 10 millimeters per year.

How does heating of the mantle drive the movements of the continents?

What is a frequency of a wavelength

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

What is the relationship between wavelength of light and the quantity of energy per photon?