3 years ago

Explain how you know that gasoline burning in a car engine is a chemical change.?

Physics

2 answers:

Sonja [21]3 years ago

6 0

This is a chemical change because it is occurring during a process called combustion reaction

polet [3.4K]3 years ago

5 0

Burning, in general, is a chemical change.
Why?
This is because we are breaking and/or forming new bonds. We form a totally different substance.

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I run around a circular track, with radius 25m, for 4 and times before stopping. It takes me 16

Sergio039 [100]

Answer:

13m/s. is the answer probably but do u have ms gallup too?

4 0

3 years ago

You are attempting to row across a stream in your rowboat. Your paddling speed relative to still water is 3.0 m/s (i.e., if you

Nataliya [291]

Answer:

Please check the attached file for the diagram

Explanation:

The velocity of the of the rowboat $V_{tot}$ through the river is the resultant velocity. It is obtained taking a vector sum of the velocity in still water and the velocity of the river.

There are several ways to take this vector sum, but the question makes it simple for us to use Pythagoras's theorem because the East and North directions are perpendicular to each other.

Hence;

$V_{tot}^2=V_{still}^2+V_{w}^2\\V_{tot}^2=3^2+4^2$