A fin whale calls at 30 kHz but at the same intensity of sound as the blue Whale in question. Which call will travel farther? Why?
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Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)