Two iron blocks are the same size. one block has a higher temperature than the other. which describes the thermal energy of these blocks?
a. lower temperature means greater potential energy, which means the colder block has greater thermal energy.
b. lower temperature means greater kinetic energy, which means the colder block has greater thermal energy.
c. higher temperature means greater potential energy, which means the warmer block has greater thermal energy.
d. higher temperature means greater kinetic energy, which means the warmer block has greater thermal energy.

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?