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Black Holes were believed to have the strongest gravitational pull enabling a planet to be pulled inside and bringing to nowhere. And besides, scientists and astronomers are still unable to study this so-called Black Hole.

Hello!

Polar bears can swim approximately 25 km in 3 h. How long would it take them to swim 15 m ?​

We have the following data:

25 km = 25000 m

3 h = 3*(60min) = 180 min = 180*(60s) = 10800 s

Solving: Rule of three (directly proportional)

distance (m) ______ time (s)

25000 -------------------- 10800 s

15 -------------------------- y

multiply the means by the extremes

Polar bears would take about 6.5 seconds to swim for 15 m.

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Hello!

What acceleration will result when a 12 N Net force is applied to a 3 kg object?

We have the following data:  

F (resulting force or Net Force) = 12 N (or 12 kg.m/s²)  

a (acceleration) = ? (in m/s²)

m (mass) = 3 kg  

We apply the data to the resulting force formula, see:

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