Neglecting air resistance, the motion of an object moving vertically near earth’s surfaceis determined by the acceleration due to gravity, which is approximately 9.8 m/s2.suppose an object is thrown vertically upward att= 0 with a velocity of 20 m/s fromthe edge of a cliff that is 200 m above a river.1. write initial value problem.2. find the the velocity of the object, fort≥0.3. find the position of the object, fort≥0.4. find the maximum height of the object above the river.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.