The speed of a car increases from 2.5 meters per second to 9.0 meters per second in 3.0 seconds as it accelerates uniformly. What is the magnitude of the acceleration of the car during this 3.0-second interval?

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2