Scientists can't be sure about the early atmosphere and can only draw evidence from other sources. For example, volcanoes release high quantities of carbon dioxide. Iron-based compounds are present in very old rocks that could only have formed if there was little or no oxygen at the time.
We need to assume that the orbits are circular; this is a very good approximation and do not hesitate to adopt it. We need then to consider the basic equation of circular motion that relates centripetal acceleration, angular velocity, mass, radius and force:
. We also have the basic equation of Newton, F=ma. By checking, we see that for each planet we have that a=v^2*r where v is the angular velocity. v=
where T is the orbital period, hence we have that a=
. Denote with the index 1 the Earth case and with 2 the Mars case. We have then that
. Substituting the known values in a calculator, we get the result: the centripetal acceleration of earth is 2.32 times greater than that of Mars.
Answer:
Option A. is correct
Explanation:
Given:
A sediment core is removed from the floor of an inland sea. The sea has been in existence, off and on, throughout the entire time that terrestrial life has existed. Researchers wish to locate and study the terrestrial organisms fossilized in this core. The core is illustrated as a vertical column, with the top of the column representing the most recent strata and the bottom representing the time when the land was first colonized by life.
Solution:
A sediment core refers to a mud collected by the scientists from the bottom of lakes to interpret past ecosystems.
To assign absolute dates to fossils in this sediment core, it would be most helpful if volcanic ash layers were regularly interspersed between the sedimentary strata.
Deserts are defined by the lack of precipitation, and in fact, Antarctica is also a desert - so we can reject the first and last option since they're not typical of Antarctica.
most deserts are characterized by drastic differences in temperatures: so the best answer is: c. a huge difference between minimum and maximum daily temperatures
Answer:
low frequency; high magnitude
Explanation:
