1 thru 3 12. A 35.0-g cube of ice, initially at 0.0°C, is dropped into 180.0 g o
ID: 1730832 • Letter: 1
Question
1 thru 3
12. A 35.0-g cube of ice, initially at 0.0°C, is dropped into 180.0 g of water in initially a 35.0°C what is the final equilibrium temperature? (Specific h specific heat of water is 4186 J/kg K, and L 3.33 x 10 /kg of W heat for aluminum is 900 J/kg K, the a. 8.79 c b. 17.6°C c. 26.4°C d. 30.8 c e. 35.1°C owpane in a house is 0.5 cm thick and has an area of 1.10 m?. The temperature difference between es of the pane is 19.0°C. What is the rate of heat flow through this window? the inside and outside surfac rmal conductivity for glass is k 0.840 W/m K) a. 7020 Vw b. 3510 W c. 2200 Vw d. 1850 W e. 1180 w medes' Prinei uid 9 2 14. The tungsten filament of a light bulb has an operating temperature of about 2070 K. If the emitting area of the lament is 0.9 cm2, and its emissivity is e 0.68, what is the power output of the light bulb? (The Stefan- Boltzmann constant is ? 5.67 ! a. 56 W b. 59 W 0-8 W/m2-K4) c. 64 W d. 94 W e. 637 W The air in a balloon occupies a volume of 0.1 m3 when at a temperature of 27°C and a pressure of 1.2 atm t of aas remains constant.)Explanation / Answer
12. assuming no heat loss,
Q_absorbed = Q_released
(35 x 333) + (35 x 4.186 x (T - 0)) = (180 x 4.186 x (35 - T)) + (70 x 0.90 x (35 - T))
T = 17.6 deg C
13. Q/t = k A delta(T) / x
= (0.840)(1.10)(19) / (0.5 x 10^-2)
= 3510 W Ans(b)
14. P = sigma e A T^4
P =(5.67 x 10^-8) (0.68) (0.9 x 10^-4) (2070^4)
P = 63.8 W
Ans(c)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.