17.11 a piece of corroded metal alloy plate was found in a submerged ocean vessel. it was estimated that the original area of the plate was 800 cm2 and that approximately 2.6 kg had corroded away during the submersion. assuming a corrosion penetration rate of 200 mpy for this alloy in seawater, estimate the time of submersion in years. the density of the alloy is 7.9 g/cm3

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?