Answer: Heat current through the insulator=196W
Electric power= 196W
Explanation: Given: Kglass = 0.040W/m
Temperature of inside glassTi=175°C
Temperature of outside glass To= 35°C
Area=1.4m^2 , L= 4×10^-2
Heat current(H)= K ×A× (Ti - To)/L
Substituting the values into the equation
H = 0.04 × K × 1.4 ×(175-35)/4×10^-2
H= 196W.
The electric power = Heat current =196W
The electric power is the magnitude of heat current
Answer:
Final speed, v = 12.57 m/s
Explanation:
Given that,
Slope with respect to horizontal,
Distance travelled, d = 19 m
Initial speed of the cyclist, u = 9.5 m/s
We need to find the final speed of the cyclist. Let h is the height of the sloping surface such that,
h = 3.46 m
Let v is the final speed of the cyclist. It can be calculated using work energy theorem as :
v = 12.57 m/s
So, the final speed of the 12.57 m/s. Hence, this is the required solution.