At an amusement park water slide, people slide down an essentially frictionless tube. The top of the slide is 3.0 meters above the bottom where they exit the slide. (g = 10 m/s) What kind of energy involved in this situation? Which kind of energy has changed to which?

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

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

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2. a. 9.5 m b. 11.9 m c. 15.2 m d. 23.8 m