an electromagnetic wave has an electric field with peak value 120. What is the averge energy delievered to a surface

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Which planet do you think would be easiest for humans to colonize some day?

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?