To estimate the central temperature of the Sun, scientists
A) create a version of the Sun in a laboratory.
B) use computer models to predict interior conditions.
C) send probes to measure the temperature.
D) monitor changes in Earth's atmosphere.
B) use computer models to predict interior conditions.
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Parallax is the apparent change in location of an object due to the motion of the observer
a. True b. False Indicate whether the statement is true or false
What is a protostar?
A) a star that is still in the process of forming B) a star that has planets C) an intermediate-mass star D) a star in its final stage of life
Which of these forms of radiation passes most easily through the disk of the Milky Way?
A. red light B. blue light C. infrared light
A researcher is investigating a cubic crystal with x-rays. He is looking at Bragg reflection from the planes parallel to the cube faces
He finds that when using x-rays of 0.165 nm a strong first maximum occurs when the beam makes an angle of 23.5° with the planes. What is the spacing of adjacent atoms in the crystal?