IP A hot-air balloon rises from the ground with a velocity of (3.00 m/s ). A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (6.00 m/s )x relative to the balloon. When opened, the bottle is 7.00 m above the ground. Part A What is the initial velocity of the cork, as seen by an observer on the ground? Enter your answers numerically separated by a comma. ? Vz. Vy = m/s Submit Request Answer Part B What is the speed of the cork, as seen by the same observer? m/s Submit Request Answer Part C What is its initial direction of motion, as seen by the same observer? above horizontal Part D Determine the maximum height above the ground attained by the cork. AEd Ymaz Submit Request Answer Part E How long does the cork remain in the air? t = Submit Request Answer t