Answer:
The time it takes light to cover 1.5 km was too short to be measured by Galileo's instruments.
Explanation:
The speed of light is 
, which means the time it takes to cover a distance of 1.5 km (or 1,500m) will be
which is 
of a second! This time delay could in no way be measured by Galileo considering the fact that he was using his heartbeat to measure time!
Answer:
false, they are more reliable.
Explanation:
i had to do it last year.
Answer:
Your answer should be 20km/h
Explanation:
Answer:
D. The air we breathe is a homogeneous mixture because it has substances but the same appearance throughout.
Explanation:
The air we breathe is a homogeneous mixture.
Air is a mixture of many gases. A homogeneous mixture is one whose constituents exists in one phase.
Air is a gas - gas mixtures.
A mixture has indefinite composition. They consist of two or more elements and or compounds in any proportion by mass.
Constituents retain their identities i.e. physical properties are retained.
