Cause: sewage dumped in rivers,disease spread, and industrial waste dumped into rivers
Effect: fish die off, destroyed habitats, oil spills on land that mixes with run off
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Answer:
It crates Magnesium Fluoride
Explanation:
Answer:
m = 3.57
Explanation:
Given that,
Sergei uses a lever to lift a heavy rock. He obtains a 2.5m lever and places the fulcrum 0.7m from the rock.
We need to find the ideal mechanical advantage of Sergei's lever.
It is equal to the ratio of resistance arm to the effort arm. In terms of length it is given by :

So, the ideal mechanical advantage of the lever is 3.57.
Answer:
The first eagle hear a frequency of 4.23kHz and the second eagle hear a frequency of 3.56kHz
Explanation:
Given that
both eagle are flying towards one another
speed of the first eagle v1 = 15m/s
speed of the second eagle v2 = 20m/s
frequency emitted by the first eagle f1= 3200Hz
frequency emitted by the second eagle f2 = 3800Hz
speed of sound v = 330m/s

the second part

The first eagle hear a frequency of 4.23kHz and the second eagle hear a frequency of 3.56kHz