Risk Latte - BH Quiz #1

Black Holes (Easy) Quiz #1

(For all numerical problems, you are required to make an educated guess)

  1. If our Earth were to be compressed into a Black Hole then its radius would be approximately

    a) 0.2 millimeters
    b) 4.35 millimeters
    c) 8.70 millimeters
    d) 22.5 millimeters

  2. 2. If our moon were to be compressed into a Black Hole then its radius would be

    a) 0.2 millimeters
    b) 4.35 millimeters
    c) 8.70 millimeters
    d) 22.5 millimeters

  3. Suppose John is 5.6 km from a black hole that weighs as much as our Sun and has a radius (Schwarzschild radius) of 2.8 km and Peter is quite far away from John. If 60 seconds elapse on a clock that John is carrying then the corresponding flow of time on the clock that Peter is carrying will be approximately:

    a) 35 seconds
    b) 55 seconds
    c) 70 seconds
    d) 85 seconds

  4. The mathematics of rotating black holes was first worked out by

    a) Albert Einstein
    b) Roy Kerr
    c) Stephen Hawking
    d) John Wheeler

  5. The Golden Age of Black Hole research is considered to be

    a) Early 1930s to mid-1940s
    b) Early 1940s to mid-1950s
    c) Mid-1950s to mid-1960s
    d) Mid-1960s to mid-1970s.

  6. The name "Black Hole" was coined by which of the following physicists?
    a) Roger Penrose
    b) John Wheeler
    c) Kip Thorne
    d) Roy Kerr

  7. The first solution to Einstein's equation of General Relativity was given by:

    a) Karl Schwarzschild
    b) J Robert Oppenheimer
    c) Kurt Gӧdel
    d) Satyen Bose

  8. The ratio of a black hole's circumference to its diameter is

    a) Greater than π (pi)
    b) Much greater than π (pi)
    c) Smaller than π (pi)
    d) Much smaller than π (pi)

  9. A black hole has

    a) One hair
    b) Two hairs
    c) Three hairs
    d) No hair

  10. The notion that every black hole is inhabited by a singularity was proved by

    a) Kip Thorne
    b) Roger Penrose
    c) Stephen Hawking
    d) Brendon Carter


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