Answer:
a) u(x) =21.47°C
b) u(x) =27.53°C
Explanation:
This requires Newton's Law of Cooling. The formula is:
u(x) = T + (T₀ - T)×e^(kt)
Plugging in our information:
u(x) = 30 + (7- 30)×e^(kt)
u(x) = 30 - 23×e^(kt)
at temperature 16°C at time 2 min.
16 = 30 - 23×e^(2 k)
e^(2k) = 14/23
2k = ln(14/23)
k = - 0.248
Temperature at t= 4 minute
u(x) = 30 - 23×e^(-0.248×4)
u(x) =21.47°C
temperature at t = 9 min
u(x) = 30 - 23×e^(-0.248×9)
u(x) =27.53°C
Answer:
Deductive reasoning
Explanation:
deductive reasoning
the process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions about it
Answer:
62.64 RPM.
Explanation:
Given that
m= 4.6 g
r= 19 cm
μs = 0.820
μk = 0.440.
The angular speed of the turntable = ω rad/s
Condition just before the slipping starts
The maximum value of the static friction force =Centripetal force
Therefore the speed in RPM will be 62.64 RPM.