16. which method is used to deliver heat in most central heating systems?
o conduction
o convection
o radiation

If forces acting on an object are unbalanced. true or false

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?

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.)