On a trip to Edmonton, Rob travels at 100km/h(N) for 2.00h and stops for 15.0 min in Red Deer for a coffee. While sipping his coffee he realizes that his Flame's flag blew off his car so he drives back to Calgary to find it. After 30.0 min of driving 110km/h(S) he sees it, turns around and then resumes his trip to Edmonton at 140km/h(N) and arrives 1.25h later. a) what distance did he travel?
b) what is his displacement?
c) What is Rob's average speed?
d) What is Rob's average velocity?
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1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light