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vredina [299]
4 years ago
12

a bridge is 500m long. A 100m long train crosses it at a speed of 30m/s. Find the time taken by the train to cross it.

Physics
1 answer:
UkoKoshka [18]4 years ago
4 0
For the nose of the train to cross from one side of the bridge
to the other takes 500m.  But then the nose must travel another
100m to get every bit of the train off of the bridge.  So from the time
the nose enters onto the bridge, it must travel another 600m. 

That will take                     (600 m) / (30 m/sec) = 20 seconds. 
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1900s -- 1980s

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two forces equal in magnitude and opposite in direction act at the same point on an object. is it possible for there to be a net
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5 0
3 years ago
A certain planet has a radius of 4990 km. If, on the surface of that planet, a 95.0 kg object has a weight of 591 N, then what i
aniked [119]

Answer:

3743.489 kg

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F_g = 591 N

G = 6.674x10^-11 constant of gravity

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7 0
3 years ago
Which one of the following statements accurately describes a characteristic of adolescence?
Yuliya22 [10]

Hi!


Answer D would be the best option.


During the period of adolescence, which is generally between 13-19, the individual goes through a transitional period which is characterized by changes in emotional, physical and mental capacities.

These changes consequently result in the adolescents' desire to be more independent, and to govern their lives as how they deem more fitting, which results in the rebellious nature in the individual.

The other options include characteristics that MAY be seen in individuals, but is not a defining characteristic of adolescence and is not very common.


Hope this helps.

7 0
3 years ago
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