A ball mass m is launched up a semicircular in a way that at the top of the chute, just before free fall, the ball has a centripetal acceleration of magnitude 6g. If the bottom of the chute is defined to be the height where the gravitational PE is 0 the moment the ball leaves the chute what is the mechanical energy?

Convection occurs when thermal energy is transferred by the movement of

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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.)