When We See X- Rays from an Accretion Disk in a Binary

question 108

Multiple Choice

When we see X- rays from an accretion disk in a binary system, we can't immediately tell whether the accretion disk surrounds a neutron star or a black hole. Suppose we then observe each of the following phenomena in this system. Which one would rule out the possibility of a black hole?

• A)bright X- ray emission that varies on a time scale of a few hours
• B)intense X- ray bursts
• C)visible and ultraviolet light from the companion star
• D)spectral lines from the companion star that alternately shift to shorter and longer wavelengths

Recognize enforceability issues related to noncompetition clauses within contracts.

Identify factors considered by courts in determining the legality and enforceability of agreements based on public policy.

Understand the concept of unconscionability and its types (procedural and substantive) in contract law.

Recognize the legal implications of exculpatory clauses in contracts.

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