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Inessa05 [86]
3 years ago
12

Which of the following describes a risk associated with the use of hydropower as an energy source?

Physics
1 answer:
castortr0y [4]3 years ago
5 0
Its A: the use of hydropower often changes the natural flow of water through an ecosystem 

add me on robloxs <span />
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At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.5 m/s2. At the same insta
Licemer1 [7]

Answer:

6.96 s

Explanation:

<u>Given:</u>

  • u = initial speed of the automobile = 0 m/s
  • a = constant acceleration of the automobile = 2.5\ m/s^2
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<u>Assume:</u>

  • t = time instant at which the automobile overtakes the truck.

At the moment the automobile and the truck both meat each other the distance travel by both vehicles must be the same.

\therefore \textrm{Distance traveled by the automobile }=\textrm{Distance traveled by the truck}\\\Rightarrow ut+\dfrac{1}{2}at^2=vt\\\Rightarrow (0)t+\dfrac{1}{2}\times 2.5\times t^2=8.7t\\\Rightarrow 1.25t^2=8.7t\\\Rightarrow 1.25t^2-8.7t=0\\\Rightarrow t(1.25t-8.7)=0\\\Rightarrow t = 0\,\,\,or\,\,\, t = \dfrac{8.7}{1.25}\\\Rightarrow t = 0\,\,\,or\,\,\, t = 6.96\\

Since t = 0 s is the initial condition. So, they both meet again at t = 6.96 s such that the automobile overtakes the truck.

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3 years ago
What is salinity ? ..​
AveGali [126]

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How are wave properties and energy related?<br> EXPLAIN
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Answer:

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Evaporating water produces gaseous water. What has occurred during this process?​
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The state of a substance depends on the distribution of its atoms, therefore any atmosphere change (in this case heat) enough to change the atoms Distribution results in a change of state.

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A population is comprised of all one species, whereas a ___________ is made up of many of these.
miv72 [106K]

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Explained: There's a minimum word count I'm filling up, don't mind me.

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