An air mass is a large pocket of air with a uniform temperature and humidity
placing a magnetically hard material in a strong magnetic field
Answer:
A. cell walls
Explanation:
Plants have cell walls but animals dont.
The average velocity of the car for the whole journey is 69.57 km/h.
The given parameters:
- <em>Length of the road, L = 320 km</em>
- <em>Distance covered = 240 km at 75 km/h</em>
- <em>time spent refueling, t₂ = 0.6 hr</em>
- <em>Final velocity, = 100 km/hr</em>
The time spent by the before refueling is calculated as follows;

The time spent by the car for the remaining journey;

The total time of the journey is calculated as follows;

The average velocity of the car for the whole journey is calculated as follows;

Learn more about average velocity here: brainly.com/question/6504879
Answer:
The work could be either positive or negative, depending on the direction the object moves
Explanation: