Question

Alex drives at an average speed that is
2/5 of the average speed that Roy's train travels.
Alex takes 30 minutes to travel 50 km in her car.
Roy travels for 1 hour and 20 minutes on his train.
How far does Roy travel to 2 dp (decimal points)?
pls answer quick
worth 20 points

Answer 1

You can have a high (or low) pH water with very little buffering capacity, meaning you can easily and quickly change the pH of the water; this also means the water is unlikely to change the pH of soils or potting mixes. You can also have water with a pH above 7 with a high alkalinity, meaning it will be difficult to change the pH of the water. This also means the water, if the alkalinity is high enough or a lot of water is applied, can increase the pH of soils or potting mixes.

Answer 2

Answer:

In chemistry, an element is a pure substance consisting only of atoms that all have the same number of protons in their atomic nuclei. Unlike chemical compounds ,chemical elements cannot be broken down into simpler substance consisting of chemical means .