Unprotected exposure to the sun's rays is a factor in the development of skin cancer. Which of the following is an example of empirical evidence that supports this hypothesis? A) An advertisement for a sun block product that claims it protects skin against ultraviolet rays by a certain percentage. B) Data showing a relationship between the amount of sun exposure and the odds of getting skin cancer. C) A skin cancer survivor's recollection that he had a bad sunburn as a child. D) A model of a skin cell showing where DNA is in the cell.

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?