Identify the situations that have an unbalanced force. Check all that apply. 1. A weight speeds up as it falls through the air

2. A garbage can is at rest on the ground

3. A hockey puck moves in a straight line at a constant speed

4. A bumper hit by another car moves off at an angle

5. A balloon flies across the room when the air is released

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.