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The orbital period of the binary system containing A0620-00 is 0.32 day, and Doppler shift measurements reveal that the radial velocity of the X-ray source peaks at 457 km/s (about 1 million miles per hour). (a) Assuming that the orbit of the X-ray source is a circle, find the radius of its orbit in kilometers. (This is actually an estimate of the semimajor axis of the orbit.) (b) By using Newton's form of Kepler's third law, prove that the mass of the X-ray source must be at least 3.1 times the mass of the Sun. (Hint: Assume that the mass of the K5V visible star—about 0.5 solar mass from the mass-luminosity relationship—is negligible compared to that of the invisible companion.)
Can learning be defined as "survival of the fittest?" Why or why not? Provide specific examples in your response.
What do you believe the role of health insurance is? Do you believe health insurance plans discriminate against populations? What issues related to health insurance do you think should be addressed from a public policy standpoint?
you are designing a custom chip that has a few dense arithmetic units that demand very high current density from the power supply (500mA/mm2 peak) and a large number of units with modest current demand
What are some common problems that come from micronutrient deficiencies? How might these problems affect overall health and life expectancy?
Heat energy and new materials are brought to the surface by the __________.
What are the different ways in which we evaluate people? How do these factors play a role in our expectations of other people? What are the disadvantages of these expectations?
Note some differences between the Middle Ages and the Renaissance (in terms of economy, politics, music, religion and anything additional would be great!). Please offer your opinions on your own material and other's. (1-2 paragraph)
We want to decide whether to employ a human operator or buy a machine to paint steel beams with a rust inhibitor. Steel beams are produced at a constant rate of one every 14 minutes.
Discuss the potential suicide risk for adolescent homosexuals.
The narrator-redactors of Mark, Matthew, and Luke claimed that a ________ prompted the Sanhedrin to arrest Jesus.
Describe some psychological evidence that is relevant to our understanding of sources also causes of stress.
How did those early childhood experiences affect level of curiosity you have today? Considering that curiosity is the significant element of creativity.
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