Answer:
60/90
Explanation:
I think because the train's highest velocity is 60 n the time is 90
Answer:
find the sum of the inital and final velocitys and divide by 2 to find the average
If the measurement is in joules then you can push something or pull something as long as you are moving the object. Formula: f*n force times newtons
Answer: ok
Explanation:
The molecules in hot air are moving faster than the molecules in cold air. Because of this, the molecules in hot air tend to be further apart on average, giving hot air a lower density. That means, for the same volume of air, hot air has fewer molecules and so it weighs less.
Answer:

<em>The potential environmental impacts associated with solar power—land use and habitat loss, water use, and the use of hazardous materials in manufacturing—can vary greatly depending on the technology, which includes two broad categories: photovoltaic (PV) solar cells or concentrating solar thermal plants (CSP).</em>
Explanation:
I just answer the second question