Question

(1 point) A thermometer is taken from a room where the
temperature is 20oC to the outdoors, where the temperature is
−12oC. After one minute the thermometer reads 4oC.

(a) What will the reading on the thermometer be after 2 more
minutes?

,

(b) When will the thermometer read −11oC?

minutes after it was taken to the outdoors.

Answer #1

A thermometer is taken from a room where the temperature is
20C to the outdoors, where the temperature is
−7C. After one minute the thermometer reads
8C.
a) What will the reading on the thermometer be after 3 more
minutes?
b) When will the thermometer read -6C?

A thermometer is removed from a room where the temperature is
70° F and is taken outside, where the air temperature is 20° F.
After one-half minute the thermometer reads 60° F. What is the
reading of the thermometer at t = 1 min? (Round your answer to two
decimal places.)
How long will it take for the thermometer to reach 35° F? (Round
your answer to two decimal places.) min

A thermometer is removed from a room where the temperature is
70° F and is taken outside, where the air temperature is 30° F.
After one-half minute the thermometer reads 60° F. What is the
reading of the thermometer at
t = 1 min?
(Round your answer to two decimal places.) ° F
How long will it take for the thermometer to reach 35° F? (Round
your answer to two decimal places.)

A thermometer is removed from a room where the temperature is
23° C and is taken outside, where the air temperature is −10° C.
After one-half minute the thermometer reads 12° C. What is the
reading of the thermometer at
t = 1 min?
(Round your answer to two decimal places.)
= ° C
How long will it take for the thermometer to reach −8° C? (Round
your answer to two decimal places.)
= min

A thermometer is removed from a room where the temperure is 80F
and is
taken outside, where the air temperature is 15F. After 2 minutes
the thermometer
reads 50F. What is the reading of the thermometer at t = 4
mins?

A thermometer at 70 degrees is taken outside where the
temperature is 30 degrees. After .5 minutes the thermometer reads
50 degrees. what is the thermometer reading after 1 minute. (
answer is 40 degrees). using the information from this problem how
many minutes does it take for the thermometer to read 35 degrees?
Round answer to the nearest tenth of a minute.

Suppose that a thermometer is taken from a room that is 14
degrees Celcius and put outside where the
temperature is 6 degrees Celcius.
a) State and solve the differential equation governing the
rate of change of the temperature of the
thermometer with respect to time.
b) After 1 minute the temperature of the thermometer reads 13
degrees Celcius. When will the
thermometer read 8 degrees Celcius?

A thermometer reading 8 degreesC is brought into a room with a
constant temperature of 38 degrees C. If the thermometer reads
14degreesC after 2 minutes, what will it read after being in the
room for 4 minutes? For 9 minutes?

a thermometer reading x°C is brought into a room with a constant
temperature of 5°C. if the thermometer reads 15°C after 1 minute
and the thermometer reads 10°C after 5 minutes, what is x°C?

At 1 p.m., a thermometer reading 80°F is taken outside where the
temperature is constant. At 1:05 p.m., the thermometer reads 35° F
more than the surrounding temperature. Forty minutes after being
taken outside, the thermometer reading differs from the outside
temperature by 15° F. Determine the outside temperature. How long
will it take for the same thermometer to cool from 100° F to 60° F
in air, which is maintained at 50° F? Ans.: 40.5° F, 66.5 min

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