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Why is Einstein's general theory of relativity a better description of gravity than Newton's universal law of gravitation? Under what circumstances is Newton's description of gravity adequate?What is a gamma-ray burster? What is the evidence that gamma-ray bursters are not located in the disk of our Galaxy or in a halo surrounding our Galaxy?Why is it unlikely that a black hole has an electric charge?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.)What must happen within a hydrogen atom for it to emit a photon of wavelength 21 cm?What is the winding dilemma? What does it tell us about the nature of spiral arms?Do density waves form a stationary pattern in a galaxy? If not, do they move more rapidly, less rapidly, or at the same speed as stars in the disk?
Explain and discuss how State programs and Federal OSH Act interact when the conduct of employers caused serious injury or even death to employees. Cite specific cases to support your discussion.
Which fund would be your best choice for investment? How do you state best in this case? Explain your answer in detail.
What examples of the major types of buying situations do you see in the case study of boeing? Discuss the implications of each in terms of marketing strategy?
This solution describes how to plan for a brain-based curriculum.
Suppose you want to reduce the occurrence of some undesired social behavior (like illegal drug use). Describe two things you would do that, according to economic concepts of response allocation, would decrease the behavior.
What tools can you use to collect relevant data for decision making? What specific tool do you think would be most valuable to use and why?
Canastar Group sells three lines of prepared foods into a marketplace where total demand is 240 million cases. Canastar’s market share is 2 ½ percent; the average selling price per case is $30 and their variable costs per case are $23. Canastar spend..
Does every citizen receive a fair trial in the U.S. Please decide if the legal system is generally fair and if not, how can an informed citizenry effect change?
Granulation, or the mottled appearance of the whole solar surface, is an indication of what physical process at work in the sun?
What do you understand by the term external and internal radiation? List down the health effects associated with each of them How would you go about measuring the level of radiation
1) Why don't all companies treat their employees like Whole Foods does? Do you think they will in the future? 2) Mackey is one of the firm's founders. But is the company at a disadvantage once he retires, given Whole Foods' salary cap?
Digital dashboards offer an effective and efficient way to view enterprisewide information at near real-time. According to Nucleus Research, there is a direct correlation between use of digital dashboards and a company's' return on investment (ROI), ..
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