Transcript 16_NTQ_CRS - Dr. Robert MacKay

He can quickly walk barefoot across red hot
coals of wood without harm because of
1. mind over matter.
2. reasons that are outside mainstream physics.
3. basic physics concepts.
He can quickly walk barefoot across red hot
coals of wood without harm because of
1. mind over matter.
2. reasons that are outside mainstream physics.
3. basic physics concepts.
Which of these
continually emits
electromagnetic
radiation?
1.
2.
3.
4.
5.
An un-lit flashlight bulb.
A hot steam radiator.
A tray of ice cubes.
None do.
All do.
Which of these
continually emits
electromagnetic
radiation?
1. An un-lit flashlight bulb.
2. A hot steam radiator.
3. A tray of ice cubes.
4. None do.
5. All do.
Which body glows with radiant energy that has
its source in nuclear processes in the interior
of the body?
1.
2.
3.
4.
Sun
Earth
Both
Neither
Which body glows with radiant energy that has
its source in nuclear processes in the interior
of the body?
1. Sun
2. Earth
3. Both
4. Neither
Suppose in a restaurant your coffee is served
about 5 or 10 minutes before you are ready for
it. In order that it be as hot as possible when
you drink it, should you pour in the roomtemperature cream right away or when you are
ready to drink the coffee?
1. Right away
2. When you are ready to drink the coffee
Suppose in a restaurant your coffee is served
about 5 or 10 minutes before you are ready for
it. In order that it be as hot as possible when
you drink it, should you pour in the roomtemperature cream right away or when you are
ready to drink the coffee?
1. Right away
2. When you are ready to drink the coffee
Hot water/steam radiators are common fixtures
that nicely warm the interiors of buildings.
These radiators warm a room primarily via
1.
2.
3.
4.
conduction.
convection.
radiation.
… all about equally.
Hot water/steam radiators are common fixtures
that nicely warm the interiors of buildings.
These radiators warm a room primarily via
1. conduction.
2. convection.
3. radiation.
4. … all about equally.
You’re a consultant for a cookware manufacturer
who wishes to make a pan that will have two
features: (1) absorb thermal energy from a flame
as quickly as possible, and (2) have an inner
surface that remains as hot as possible when
cooking. You should recommend a pan with the
1. outer and inner surfaces
black.
2. outer and inner surfaces
shiny.
3. outer surface shiny and
inner surface black.
4. outer surface black and
inner surface shiny.
You’re a consultant for a cookware manufacturer
who wishes to make a pan that will have two
features: (1) absorb thermal energy from a flame
as quickly as possible, and (2) have an inner
surface that remains as hot as possible when
cooking. You should recommend a pan with the
1. outer and inner surfaces
black.
2. outer and inner surfaces
shiny.
3. outer surface shiny and
inner surface black.
4. outer surface black and
inner surface shiny.
You’re a consultant to a manufacturer of space
gear that wants to encase some instruments
in a covering that will have two properties:
(1) absorb as little energy as possible on
the side of the package facing the sun, and
(2) emit as little energy as possible on the
side facing away from the sun.
You should recommend
a covering with
1. the side facing the sun black
and the other side shiny.
2. the side facing the sun shiny
and the other side black.
3. both sides shiny.
4. both sides black.
You’re a consultant to a manufacturer of space
gear that wants to encase some instruments
in a covering that will have two properties:
(1) absorb as little energy as possible on
the side of the package facing the sun, and
(2) emit as little energy as possible on the
side facing away from the sun.
You should recommend
a covering with
1. the side facing the sun black
and the other side shiny.
2. the side facing the sun shiny
and the other side black.
3. both sides shiny.
4. both sides black.
If you wish to save fuel and you’re going
to leave your cool house for a half hour or
so on a very hot day, should you
1. turn your air conditioning
thermostat up a bit,
2. turn it off altogether,
3. let it remain at
the cool room
temperature
you desire?
If you wish to save fuel and you’re going
to leave your cool house for a half hour or
so on a very hot day, should you
1. turn your air conditioning
thermostat up a bit,
2. turn it off altogether,
3. let it remain at
the cool room
temperature
you desire?