Isn't a chemical change like something that's not a physical change or physically changed but is something that uses natural chemicals? that's my guess sorry if it's wrong I think I'm wrong though
Answer:
v = 660 miles per hour
Explanation:
Given that,
The distance covered by the airplane is 1650 miles
Time taken by airplane is 2 hours 30 minutes
We need to find the average speed of the airplane. The total distance covered divided by total time taken is called the average speed of an object.
We know that,
1 hour = 60 minutes
⇒ 30 minutes = 0.5 hour
So,
Hence, the average speed of the airplane is 660 miles per hour.
The alkali metals the first group of the periodic table it is highly reactive
Answer: C) size decreases
Explanation: Atomic radius values change as you move horizontally and vertically across the periodic table. In general, atomic radius or atom size decreases as you move from left to right.
Answer:
We are not able to create a fusion reactor on Earth because fusion energy production is not based on a chain reaction, as is fission. Plasma must be kept at very high temperatures with the support of external heating systems and confined by an external magnetic field.
Explanation: