Help me please I really need this tomorrow

Chemistry

2 answers:

scoundrel [369]2 years ago

6 0

9.D

10.A

11.C

12.B

13.D

14.C

15.A

16.A

18.C

jok3333 [9.3K]2 years ago

3 0

9. melting point

10. balloons float because they are filled with hydrogen, a gas which is less dense than air.

11. specific gravity

12. element

13. mixture

14. sodium and chlorine

15. cutting of paper

16. condensation

17. 1 and 3

18. heat energy is released

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Substances that are readily combustible or may cause fire through friction

Dvinal [7]

Answer :

Flammable substances

Explanation :

Flammable substances will catch fire and continue to burn when they contact an ignition source like a spark or a flame.

For example, methanol is a flammable liquid.

A flammable solid may also catch fire through friction. Matches are flammable solids.

3 0

2 years ago

PLZ HELP!!

Nataly [62]

A and B are experiencing winter. The picture which isn't available here in this question is attached below.

Option C.

<h3>Explanation:</h3>

The earth is tilt by an angle of 23.2° to the vertical plane. This makes the seasonal variation of earth, because in some time of the year, the northern hemisphere faces the sun directly, experiencing summer and then southern hemisphere is away from summer experiencing winter and vice versa. The summer occurs when the place directly faces the sun. And the winter happens when the place obliquely faces the sun or doesn't face the sun at all.

Here in this diagram, we can see that the points A and B are the north pole and the part in northern hemisphere respectively which aren't facing the sun directly, whereas C and D are facing the sun. Thus the southern hemisphere is experiencing summer and the northern hemisphere the winter.