Dear All,
Thank you for your previous thoughts. Could I have your further comments
please.
Height in photographs: � The apparent height of the image of your subject
(as seen in your view-finder) will double if you double the focal length of
your lens. For example, a 100 mm lens will appear to double the image height
that you saw with a 50 mm lens.
Herb Gardens: � When you are planning a herb garden, allow five plants for
each square metre. This is the space the herb plants will need when they are
fully grown.
Horizon: � In each photograph check that your horizon line is horizontal.
Otherwise your images will look like paintings that are not hanging straight
on your wall. Check that your horizon line is parallel both to the top and
to the bottom in your viewfinder.
Horizon: � To estimate the distance you can see to the horizon you need to
carry out a two step procedure. First estimate the height of your eye above
the ground or the sea in metres. Take the square root of this height and
multiply it by 3.57. This will give you the distance you can see to the
horizon estimated in kilometres. I remember this (for a height of 1 m) by
recalling the first four odd numbers 1-3-5-7. If I am observing from 1 metre
above the ground then the horizon is 3.57 km away.
Horses drinking: � A horse will drink between 50 L and 60 L on a hot day, if
it is exercising. A friend observed his horse drinking after exercise 'on a
warm day for three hours'. The horse swallowed 30 gulps of water and dropped
the water level in a trough by 40 mm. My friend, armed with a calculator
(and his considerable knowledge of algebra) calculated that the horse drank
about 7 L of water in one minute � that's nearly 250 mL per gulp. Another
horse was observed gulping, without letup, 60 swallows, which amounted to
about 15 L of water in one drinking session.
Hot Air Ballooning: � To judge your flying time, allow 10 kg of propane for
each hour of flying time.
Human Power: � Working hard a human can use three hundred joules of energy
in a second. Put another way, this means that a human can be given a power
rating of three hundred watts.
Indoor plants: � For each square metre of growing area you need at least 200
W of lights.
Kitchen planning: � Kitchen designers allow about one square metre of shelf
space for glassware and china, the same again (1 m2) for pots, casseroles
and other cooking equipment. They also allow half a square metre (0.5 m2)
for each member of the household for general storage. This is a starting
point only, as individuals vary greatly in the way they cook.
Ladders: � Your ladder should be 1 m away from a wall for every 4 m of
height you intend to climb.
--
Cheers,
Pat Naughtin
CAMS - Certified Advanced Metrication Specialist
- United States Metric Association
ASM - Accredited Speaking Member
- National Speakers Association of Australia
Member, International Federation for Professional Speakers
