What would happen to the core of the sun if its temperature rose slightly?
A) The rate at which fusion occurs would increase, leading to a contraction of the core, which would in turn cause the temperature to rise even further.
B) The rate at which fusion occurs would decrease, leading to a contraction of the core, which would in turn cause a further temperature rise.
C) The rate at which fusion occurs would decrease, leading to an expansion of the core, which would in turn cause the temperature to drop back down.
D) The rate at which fusion occurs would increase, leading to an expansion of the core, which would in turn cause the temperature to drop back down.
D
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Iron with 2 to 4.5 weight percent carbon is _________iron.
Fill in the blank(s) with the appropriate word(s).
In 1912, after studying a star cloud called the Small Magellanic Cloud, Henrietta Leavitt concluded that:
A) stars are eternal and unchanging. B) the brightest stars have the shortest pulsation periods. C) the Sun and Earth are near the edge of our Galaxy. D) there was a relationship between pulsation periods and luminosities of stars.
The numbers 9.81×10^5 and 981,000 are equivalent
a. True b. False Indicate whether the statement is true or false
When an automobile moves with constant velocity the power developed is used to overcome the frictional forces exerted by the air and the road. If the power developed in an engine is 50.0 hp, what total frictional force acts on the car at 55 mph (24.6 m/s)? One horsepower equals 746 W