Alice wants to clean her camcorder lens, which got dusty when she cleaned her room. What should she use to avoid damaging the lens

What is work? how much work is done to move an object 0 meters?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

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?