RGeologists apply various methods to study the layers of the Earth. Which of the following is a method used to study the Earth's layers? A. Scientists use seismic waves to map the atmosphere conditions anove Earths crust.
B. Scientists map seismic waves to determine the atomic structure of materials that lie beneath Earths surface.
C. Scientists measure vibrations of Earth's surface using a compass (an instrument that measures seismic waves).
D. Scientists measure the time it takes for seismic waves to reach a seismograph (an instrument that measures seismic waves).

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

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