What are the main constituents of the solar wind?
What will be an ideal response?
Protons and electrons are the main constituents of the solar wind.
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Which of the following are the two key starting assumptions of theoretical models of galaxy evolution?
A) (1) The beginning of the universe can be modeled as a giant supernova explosion and (2) this supernova created all the elements in the proportions we find them today. B) (1) Hydrogen and helium gas, along with dark matter, filled all of space and (2) some regions of the universe were slightly denser than others. C) (1) Hydrogen and helium gas, along with dark matter, filled all of space and (2) the distribution of this material was perfectly uniform everywhere. D) (1) Hydrogen gas, along with dark matter, filled all of space and (2) all the other elements came from stars.
You stand near the earth's equator. A positively charged particle that starts moving parallel to the surface of the earth in a straight line directed east is initially deflected upwards. If you know there are no electric fields in the vicinity, a possible reason why the particle does not initially acquire a downward component of velocity is because near the equator the magnetic field lines of the earth are directed
A. upward. B. downward. C. from south to north. D. from north to south. E. from east to west.
Gas in a container increases its pressure from 1 atm to 3 atm while keeping its volume constant. Find the work done (in J) by the gas if the volume is 5 liters
a. 0 b. 3 c. 5 d. 15 e. 15 × 10^2
The final phase of Pangaea's break-up was the split of
A) Antarctica from Australia, and North America and Greenland from Europe. B) South America from Africa, and Antarctica/Australia from India/Madagascar. C) Antarctica from Australia, North America from Europe, and Europe from Asia. D) Africa from Antarctica/Australia, and India/Madagascar from Asia.