How could you measure earth’s orbital speed by photographing the spectrum of a star at various times throughout the year? (hint: suppose the star lies in the plane of earth’s orbit.)

How would doubling the made of an object change the objects potential energy

Which of the following are appropriate acceleration units?

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is