Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 112.8 Newtons at an angle of 30˚ above the horizontal to drag his backpack a horizontal distance of 78.1 meters to the right. Determine the work (in Joules) done upon the backpack. (round to the nearest tenth)

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line