A 50 gm cube of ice, initially at 0 degree C is dropped into 160 gm of water in

Question

A 50 gm cube of ice, initially at 0 degree C is dropped into 160 gm of water in a 80 gm aluminum container, both initilly at 43 degree C. What is the final equilibrium temperature? (Specific heat for aluminum is 0.215 cal/gm-C degree and L_f = 80 cal/gm.) 28.666667 degree C 36.55 degree C 14.9 degree C 5.76 degree C 20.43 degree C A window pane is 5.5 centimeter thick and has an area of 1 m^2. The temperature difference between the inside and outside surfaces of the pane is 82 C degree. What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.8 J/s-m-C degree.) 1353 172.15 6.71 451 1193 A gasoline engine with an efficiency of 28% operates between a high temperature T_1 and a low temperature T_2 = 25 degree C. If this engine operates with Carnot efficiency, what is the high-side temperature T_1? 78.96 degree C 140.9 degree C 745 degree C 310.1 degree C 26.32 degree C y = 6sin(4 t - 3 x). Velocity of propagation of the wave is 4.8 0.75 1.33 4 4 If the distance between a point sound and dB detector is increased by a factor of 8, what will be the reduction in intensity level? 11.6 N 19.92 N 18.06 N 28.872 N 6.64 N What is the root mean square velocity of gas X molecules at a temperature of 80 degree C? (R = 8.314 J/mole-K, N_A = 6.02 times 10^23, and the molecular of gas X = 70 grams) 331.2 m/s 1848 m/s 206 m/s 354.7 m/s 5600 m/s A mass on a spring vibrates in sample harmonic motion at a frequency of 4 Hz and an amplitude of 11 cm. If a timer is started when its displacement is a maximum (hence x = 11 cm when t = 0), what is the displacement of the mass when t = 4.3 s? 13.2 cm 3.399 cm 5.16 cm -10.2 cm 4.777778 cm What is the entropy change to turn 18 grams of ice (C_ice = 53 cal/gr degree C) at = 27 degree to 16 grams of steam? 49.68 cal./K 82.62 cal./K 33.96 cal./K 58.1 cal./K 16.56 cal./K A 2 loop string has a linear mass density of 28 grams/cm and a length of 135 cm. If the tension in the string is 7 N, at what frequency is the string vibrating? 89.1 Hz 11.71 Hz 42 Hz 38.6 Hz 14 Hz What is the first overtone frequency for a 1.5m length organ pipe, closed at one end? The speed of sound in air is 3.42 m/s? 15.49 Hz 58.3 Hz 39.6 Hz 110.88 Hz 171 Hz

Explanation / Answer

solving first question of page

1

Let the final temperature is T

using calorimeter principle

heat lost=heat gained

50*80.3 + 50*1*T=160*1*(43-T) +80*0.215*(43-T)

we got

T=15.86 C

more near to 14.9 C

so 14.9 C is correct answer

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