Answer:
I'm not sure
Explanation:
sorry I'm not smart that's why I have this app
Answer:
(a) for 43.75 mm rod, the temperature is 121.97 ⁰C
(b) for 87.50 mm rod, the temperature is 80.17 ⁰C
(c) for 175.00 mm rod, the temperature is 53.46 ⁰C
Explanation:
Given;
L = 175 mm = 0.175 m
D = 5mm = 0.005
= 200°C
T∞ = 20°C
Heat transfer coefficient h = 30 W/m²·K
Thermal conductivity of brass K = 133 W/m.°C
where;
T is the temperature of the rod at different casting distance,
Part (a) for 43.75 mm rod
Part (b) for 87.50 mm rod
Part (c) for 175.00 mm rod
Explanation :
An electrical circuit can be either connected in series or parallel.
Series combination: The current flowing in each resistor is the same and the equivalent resistance is given by :
Parallel combination: The voltage for all components in the parallel combination is the same. The equivalent resistance is given by :
So, our of given options the correct one is (b) because the current flowing in both the resistors is the same.
Let be the distance between the base of the ladder and the bottom of the wall, and the distance between the top of the ladder and the bottom of the wall, so that
Differentiate both sides with respect to time :
When , the top of the ladder is
above the ground. Then, given that the bottom of the ladder slides away from the wall at a rate of , we have
That is, the top of the ladder is sliding downward at a rate of 0.24 ft/s.