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MArishka [77]
3 years ago
6

A runner is jogging in a straight line at a

Physics
1 answer:
soldi70 [24.7K]3 years ago
4 0

Answer:

13 km

Explanation:

The bird flies from the runner, to the finish line, and back to the runner.  We can write two equations for the distance it travels:

d = 7.8 km + 7.8 km − 4.9 km/hr × t

d = 24.5 km/hr × t

Solve for t in the second equation and substitute into the first:

t = d / 24.5

d = 7.8 + 7.8 − 4.9 (d / 24.5)

d = 15.6 − 0.2 d

1.2 d = 15.6

d = 13

The bird flies a cumulative distance of 13 km.

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Explanation:

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4 years ago
You need to know the height of a tower, butdarkness obscures the ceiling. You note thata pendulum extending from the ceiling alm
AysviL [449]

Answer:

The towers height is 322m  

Explanation:

We can assume that a simple pendulum hangs from the top of the tower.  

In this case, the length of the pendulum will be the same as the height of the tower.

We will use the next expression then:

T=(2pi)(\sqrt{L/g})

Where T is the period, L is the pendulum length and g is the gravity (9.81m/s^2)

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Replacing:

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3 years ago
oe finds that the temperature of a substance is 12 degrees Celsius. What does this tell Zoe about the substance? Its internal en
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Answer:

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3 years ago
According to Newton’s law of universal gravitation, which statements are true? As we move to higher altitudes, the force of grav
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