We had an experiment that is entitled "balloon rocket" it is an experiment using the force of balloon to make the straw move. it is about law of interaction.
did the escaping air have to hit anything to make the balloon move? ?
my answer here is no, because even in space, space rockets can travel even in a vacuum.
is it correct? ?

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?