Ablock of iron (mass: 10 kg, density: 7840 kg/m3; c_v: 0.45 kj/kg) is initially at 100 kpa and 30 deg-c. because of external heating, its entropy increases by 5 kj/k. determine the final temperature (in deg-c) of the iron block. use the sl model

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)