In the lesson a thermos is presented as an example of an isolated energy system. How could you change the thermos into an open e
2 answers:
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Answer:
Explanation:
Newton's law of cooling
Rate of cooling
Where To is the surrounding temperature
T is object temperature at any time t
now by removing proportionality sign
Now by separating variables
So
Where C is constant
C' is also a constant and it can be find by using boundary conditions.
Answer: 0.313 rad/s
Explanation:
The equation that relates the velocity and the angular velocity
in the uniform circular motion is:
(1)
Where is the radius of the space station (with a diaeter of 200m) that describes the uniform circular motion.
Isolating from (1):
(2)
On the other hand, we are told the “artificial gravity” produced by the cetripetal acceleration is
, and is given by the following equation:
(3)
Isolating :
(4)
(5)
Substitutinng (5) in (2):
(6)
This is the angular velocity that would produce an “artificial gravity” of 9
.