Mark Brader:
> This is the *rotating* quiz. The high scorer will be invited to set
> RQ #35.
And, I think for the first time, that's the entrant posting merely
as "David". Congratulations! Take it away, please.
> 1. The word "helicopter" is derived from the Greek for what?
Spiral (as in helix) wing (as in pterodactyl). I accepted "helical
wing". 1 for Marc, Rob, and David.
> 2. Most helicopters have a tail rotor, which is a sideways-facing
> propeller. Briefly explain why it's needed.
To counter the torque applied to the helicopter body in an equal and
opposite reaction to the motor's torque on the main rotor. You had
to mention at least that the spin would be possible to the rotor's.
1 for Stephen, Joachim, Calvin, and Dan.
> 3. Briefly explain how an autogyro is different from both a
> helicopter and an airplane.
Unlike an airplane, it is lifted by a rotary wing. Unlike a
helicopter, that rotary wing is not directly powered, but is driven by
the air as the aircraft is driven forward by a propeller. Nobody gave
all these details but three answers were complete enough to accept.
1 for Rob, Joachim, and David.
A few hours after posting this contest, I watched the episode
of "Jeopardy!" from two days earlier -- and one of the questions
showed a picture of an autogyro, mentioned its inventor, and
asked what it was. And none of the players got it.
> 4. Name the Clark Gable movie in which a character arrives for
> the climactic scene by autogyro.
"It Happened One Night". King Westley (Jameson Thomas) pilots
an autogyro to his wedding to Ellie Andrews (Claudette Colbert).
1 for Stephen.
> 5. The NBC Mystery Movie was a rotating or "wheel" TV series.
> Give the last names of any *two* of its various lead detective
> characters.
The three easy ones, because they appeared for the whole 1971-77 run
of the series, were Columbo, [Sam] McCloud, and [Stewart] McMillan.
Also correct were: [Thomas] Banacek (1972-73), [Frank and Steve]
Faraday (1973-74), [Jefferson] Keys ("Cool Million", 1972-73), [Dan]
Madigan (1972-74), McCoy (1975-76), [Amy] Prentiss (1974-75), Quincy
(1976), [Hec] Ramsey (1972-74), [David] Small ("Lanigan's Rabbi",
1977), [Ernesta and Gwen] Snoop ("Snoop Sisters", 1973-74), [Harry]
Tenafly (1973-74). (Titles are shown only where they did not include
the character's last name.) 1 for Marc.
> 6. The Earth rotates around its axis at what angular velocity?
1 revolution per *sidereal* day. Nobody gave an exact answer,
but Stephen's answer of 361°/day was within 0.004%. 1 for Stephen.
> 7. Which planet rotates about an axis almost parallel to its
> orbital plane, so that its polar regions (analogous to
> the areas within the Earth's Arctic and Antarctic Circles)
> cover most of the planet?
Uranus. 1 for Stephen, Jeff, Rob, Joachim, Peter, David, and Dan.
> 8. LP records are designed to be played while rotating at what
> angular velocity?
33+1/3 RPM. 1 for Stephen, Marc, Jeff, Rob, Peter, David, and Dan.
> 9. The winds caused by weather systems often form a rotating
> pattern. What is the direction of this rotation, at
> ground level, in the case of an anticyclone in the Southern
> Hemisphere?
Anticlockwise. 1 for Jeff, Rob, Joachim, Peter, Calvin, and David.
> 10. The Whirlpool at Niagara Falls is a pool forming a bulge
> on one side of the Niagara River. The incoming water from
> the rapids produces many small whirlpools, but in addition
> the river's flow drives an overall rotation of the pool.
> In summer, the direction of this overall rotation reverses
> between night and day. What triggers the change?
The river's depth varies according to how much water is diverted
for hydroelectric power generation. 1 for David and Dan.
The hydroelectric plants these days are downstream of the Whirlpool.
In the daytime in summer, to preserve the appearance of the falls
only 1/2 of the natural water flow is diverted; at other times,
3/4 is diverted. As the river also has a sharp bend at this location,
with deep water the outgoing current has room to cross under the
very fast incoming current and reach the outlet; with shallow water
the two flows collide and divert each other.
Deep-water flow Shallow-water flow
/------\ /------\ W N
/ <<< \ / >>> \ x
| v ^ \ | ^ v \ S E
| v ^ \ | ^ v \
| v ^ \------ | ^ \ \------
\ >> ^ >>>>>>>>> \ \. >>>>>>>>>
\-\ ^ /------- \-\ \ /-------
\ ^ / \ ^ /
| ^ | | ^ |
| ^ | | ^ |
> 11. The Frisbee was named after a pie plate from a similarly
> named company, but how did that company spell the name?
Frisbie. 1 for Jeff and Dan.
> 12. Name a word that produces a synonym of itself when
> transformed by rot13. Both the original word and the synonym
> must be ordinary, well-known words.
Irk.arg,
vex.net. Or something like that. :-)
> For questions requiring a numerical answer, use any convenient unit;
> if nobody gets an exact answer, then the closest answer actually given
> will be accepted.
For future reference: if the answer is a rational number using degrees
or revolutions for the angular measure, anything using radians is not
going to be convenient.
Scores, if there are no errors:
"David" 6
Rob Parker 5
Stephen Perry 5
Dan Tilque 5
Jeff Turner 4
Joachim Parsch 4
Marc Dashevsky 3
Peter Smyth 3
"Calvin" 2
Erland Sommarskog 0
--
Mark Brader "Although I have not seen any mention of SoftQuad
Toronto or HoTMetaL in the magazine, it is certainly
m...@vex.net worth while reading." -- Selwyn Wener