trial AKE NM 3 ५ 5 0.310151- m = yus. yg 0.27270 N.m 0.26923N.m 0.25897 Nm 0.27753 Nm Vei Ji=0.62 V+= 1,29 Vi=0,65 V+= 125 Vi=0.61m/s Vf= 1.23m 15 vid Vf=125765 Vi= 0.70 m/s. Vf 1.30m/s 3 Printed 1. AKE= ½ mv^2= ½ mv^2 Sample calculations (run 1 & 2): Run 1: AKE= x 0.4454 x (1.29^2 - 0.62 ^2) = ½ x 0.4454 x (1.6641-0.3844) = 0.2849 J Run 2: AKE= x 0.4454 x (1.25^2 - 0.65 ^2) = 0.2538 J Run 3: 0.2540 J Run 4: 0.1461 J

A heat engine does 30.0 J of work and exhausts 35.0 J of waste heat during each cycle. Part A What is the engine's thermal efficiency? Express your answer as a percentage. 46.2 % Submit Correct Part B Previous Answers If the cold-reservoir temperature is 30.0 °C, what is the minimum possible temperature in °C of the hot reservoir? Express your answer in degrees Celsius. —| ΑΣΦ 383.35 ? °C

A sophomore with nothing better to do adds heat to 0.480 kg of ice at 0.00° C until it is all melted. Part A What is the change in entropy of the water? Express your answer with the appropriate units. µA ? ASı Value Units Submit Request Answer Part B The source of heat is a very massive body at a temperature of 25.0° C. What is change entropy this body? Express your answer with the appropriate units. HÁ ? AS2 = Value Units %3D Submit Request Answer Part C What is the total change in entropy of the water and the heat source? Express your answer with the appropriate units.

Thermodynamics Question! Please and thank you for all your help! Please make sure the answer is valid and in the correct units!

Wind and solar power are both considered renewable sources of energy. Although they are not as widespread as fossil fuel generators, they are slowly gaining popularity worldwide. a) How does a wind turbine generate electricity? b) How does a solar cell generate electricity? c) What common disadvantage do these two methods share? d) If you had to choose between installing equivalent capacity solar cells or wind generators at your home, which one would you install? Justify your answer IU

Spontaneous processes do not exists 2. Which of the following mechanical processes are not reversible, in the 2 sense that energy converted from one form to another cannot be completely converted from the second form back to the first form? * O A ball is tossed upward, gaining height. A moving block slides to a stop because of friction. O A moving cart is caught by a spring, stretching the spring.