Question

true or false
1) The speed of sound through air demands on Temperature.
2) If we move the screen backwards the umbra becomes smaller.
3) when two equal and opposite forces act at the same point then resultant forces is doubled then either of the forces.
4) the forces of friction produces light.​

Answer 1

Answer:

1 ) true, 2) false ,3) true ,4)false

Explanation:

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