(Figure 1) shows a graph of the motion of the blades of a blender that starts empty and is initially turned off. Then the power is turned on at the highest speed setting, some ice cubes are added, and the blades slow down. The blades are 2.6 cm long.

Part A When the blender is empty and running at high speed, how much time is required for a blade to turn by 90 ? Express your answer with the appropriate units. ? At = Value Units Submit Request Answer Part B How many revolutions does a blade complete between 15 and 20 seconds? Express your answer in revolutions. AEQ ? A0 = revPart C How fast is the tip of a blade moving when the blender is running empty? Express your answer with the appropriate units. HA C ? U = Value Units Submit Request Answer\f