A person runs 21.0 km west then turns around and runs 10.0 km east. (L2) a) What is the person's distance? (31.0 km)
b) What is person's displacement? (11.0 km west)

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.

Consider the phase change taking place in the picture. you could use all but one statement to describe what is happening here. that is: a) temperature is increasing. b) kinetic energy is increasing. c) the space between the particles remains the same. d) the attractive force between the particles is decreasing.