Aspeed boat increases its speed uniformly from vi = 20.0 m/s to vf = 30.0 m/s in a distance of 2.00 x 10^2m. (a) draw a coordinate system for this situation and lable the releveant quantities, including vectors. (b) for the given information, what single equatino is most appropriate for finding the acceleration? (c) solve the equation selected in part (b) symbolically for t he boats acceleration in terms of vf, va, and î”x. (d) substitute given values, obtaining that acceleration. (e) find the time it takes the boat to travel the given distance?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

In what direction does an applied force move an object

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