An earthquake releases two types of traveling seismic waves, called transverse and longitudinal waves. the average speed of the transverse and longitudinal waves in rock are 9.1 km/s and 5.7 km/s respectively. a seismograph records the arrival of the transverse waves 71 s before that of the longitudinal waves. assuming the waves travel in straight lines, how far away is the center of the earthquake?
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The energy produced as a result of this flow of electrons from atom to atom is called
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Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?
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