How many kilojoules of heat must be transferred to a 480-g aluminum pizza pan
to raise its temperature from 22°C to 234°C? (Caluminum - 0.96 J/EC)

Blank liquids and gases exert a buoyant force on objects placed in them

Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?

Idon’t know the answer to it and am stuck.