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Mashcka [7]
3 years ago
9

Which technological advancement made the Pony Express unnecessary?

Physics
2 answers:
Vikki [24]3 years ago
7 0
Telegraph! Because telegraphs were used to communicate and to (at that time) send messages rapidly.
Sergeu [11.5K]3 years ago
6 0
The answer is Telegraph
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Suppose a 1300 kg car is traveling around a circular curve in a road at a constant
Scrat [10]

Answer:

F = 4212 N

Explanation:

Given that,

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We need to find the magnitude of the unbalanced force that steers the car out of its natural straight-  line path. The force is called centripetal force. It can be given by :

F=\dfrac{mv^2}{r}\\\\F=\dfrac{1300\times 9^2}{25}\\\\F=4212\ N

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4 0
2 years ago
The energy that generates wind comes from what source?
Rudiy27

Answer:

we can say that wind energy is due to

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3 0
3 years ago
Science is the process of pursuing knowledge?
tatyana61 [14]

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4 0
3 years ago
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Its the rate of doing work.

5 0
2 years ago
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4 0
2 years ago
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