Here are the responses to your questions:
21. Without additional context regarding the distances between points A, B, C, and D, I cannot definitively determine which statements are true. However, based on the choices given:
- a. In the interval from point B to point C, the object travels 30 m.
- b. In the interval from point C to point D, the object travels 0 m.
- c. In the interval from point A to point B, the object travels 30 m.
- d. In the interval from point A to point D, the object travels 11 m.
If the total distance traveled from A to D is the sum of the distances from A to B, B to C, and C to D, you would analyze how these distances relate to determine which statement is true.
For a likely answer: If I assume the distances provided in options a, b, c, and d are consistent, the correct statements may depend on the scenario. Once you have the actual distances or a representation of them, you can determine which is true.
22. The scenario of "My car hits a mosquito, and the mosquito hits back, equally" describes:
- a. 3rd Law (Newton's Third Law - for every action, there is an equal and opposite reaction).
24. An object that is accelerating may be (choose all that apply):
- a. not moving. (An object can accelerate from rest.)
- b. slowing down. (Negative acceleration or deceleration.)
- c. gaining speed. (Positive acceleration.)
- e. changing direction. (Acceleration can also involve changing direction.)
Thus, the correct options are a, b, c, and e.
25. The terms that correctly represent a vector quantity and its respective unit:
- d. force - Newton (Force is a vector quantity, and its unit is Newton, N).
26. The repetition of question 25 leads back to the same responses, which is:
- d. force - Newton.
27. If you keep a gas's temperature constant, how would you increase the volume of the gas?
- d. You would decrease the pressure. (According to Boyle's Law, at constant temperature, increasing the volume of a gas results in a drop in pressure.)