Answer:
a) 20 m/s
b) 37.5 m)s
Explanation:
Average speed = total distance ÷ total time
=> (a) average speed of a car that travels 400m in 20s
= 400/20 = 20 m/s
& (b) average speed of an athlete who runs 1500m in 4 minutes (or 4×60=240 seconds)
= 1500/240 = 37.5 m/s
General Characteristics of Acids & Bases. Chemists measure the strength of an acid or base by its pH, which is a term that refers to the "power of hydrogen.". The midpoint of the pH scale is neutral. Compounds with a pH lower than the midpoint value are acidic while those with a higher value are basic or alkaline.
1km=10^3 m,1km^3=10^9cubic metres answer is 1.4x10^18cubic meters
<span>i believe the answer is
D. Wool is an excellent thermal insulator because heat flows through it very slowly.</span>
Answer:
Fossil Combustion Reactions
Explanation:
It's more efficient (I'll edit later)
