3 years ago

Which of the following is a chemical change?

Physics

2 answers:

svet-max [94.6K]3 years ago

5 0

The answer is D. Water breaking down into hydrogen and oxygen

HTH ^^

slamgirl [31]3 years ago

4 0

D water breaking down into hydrogen and oxygen

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Answer:

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2 years ago

Kids are pelting a window with snowballs. On average, two snowballs of roughly 300-g mass hit the window each second, moving hor

hram777 [196]

Answer:

The average force exerted on the window due to two snowballs is 6 N

Explanation:

Given:

Mass of snowballs $m = 300 \times 10^{-3}$ Kg

Velocity of snowball $v = 10 \frac{m}{s}$

For finding the average force,

Force is equal to the change in momentum,

$F = \frac{dP}{dt}$

Here, final velocity is zero so we write,

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$F = 3 \times 2$

$F = 6$ N

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2 years ago

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