Cosmologists study
the origin, distribution, and future of life
the paths of comets and asteroids
the origin, structure, and future of the universe
the origin and movement of galaxies

What produces a record of seismic waves? richter scale seismogram barometer seismograph

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

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?