A small stone is kicked from the edge of a cliff. Its x- and y-coordinates as functions of time are given by x = 19.2t and y = 4.12t − 4.90t^2,where x and y are in meters and t is in seconds. (Do not include units in your answer.) Write a vector expression for the stone's position as a function of time (in m), using the unit vectors î and ĵ. (Give the answer in terms of t.)

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)