<span>C. A concave lens can only form a virtual image, because they are thinner in the middle and thicker around the edges.</span>
Answer:
hi you can just buy new ruler lol joke
1. energy and air
2.
Answer
D. The average speed is 2.5 meters/second, and the average velocity is 0 meters/second.
The difference between speed and velocity is that, speed is a scalar quantity while velocity is a vector quantity.
Average speed = total distance/Total time
= (150 + 150) / (2×60)
= 300/120
= 2.5 m/s
Average velocity = Total displacement/ Total time
= (150 + -150) / (2 × 60)
= 0/120
= 0 m/s
