Imagining a balloon with a thermometer inside. now imagine putting on scuba gear and taking said balloon down to the deep end of a pool (say 3-4m deep). what they think will happen to the diameter of the balloon ( ) and what the thermometer will do ( )?

you would expect a sound wave to speed up. - b)

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)