A motorbike moves along a straight road through a distance of 1.2 km. Through the first 1/4 of that distance, it accelerates from rest at a rate of 2.0 m/s2

. Through the rest of that distance, it decelerates to rest

at rate of 0.6 m/s2
. a) What is its travel time through the distance?
b) What is its maximum speed?
c) Graph position and velocity versus time for the distance.

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

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?