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Mars2501 [29]
2 years ago
15

Anyone know the answer

Physics
1 answer:
murzikaleks [220]2 years ago
5 0
I think it might be C :)
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Solar energy is: expensive renewable inefficient during winter all of the above
creativ13 [48]

Solar energy is free and renewable.  

Its efficiency is determined by the photovoltaic or heat-exchanging equipment used, and the efficiency of the infrastructure built to interconnect them.  None of that depends on the time of the year.  For a given amount of solar energy absorbed by the collector, the amount of useful output energy doesn't change with the season.

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Which describes who will record their measurements in joules?
Aleksandr [31]

Answer: Lily, Astrid, Henry, and Bob

Explanation:

By a small online search i've found the image related to this question, and you can see it below.

Joules is a unit of energy, such that:

Joule = kg*m^2/s^2

In other hand, Watt is a unit of power, such that:

1 W = 1 J/s

Then if we measure power, we are measuring watts, which is equivalent to measuring the total amount of energy in joules in a given period of time, and then dividing that by the time. And if we measure energy, we are directly measuring joules.

Then if we measure power or energy, at some point our measures will be in joules (unless we have an specific device to measure power, but these usually exist for electronic systems, not for mechanical/dinamic systems like the ones in the image), this means that all of them will record their measurements in joules, so the correct option is Lily, Astrid, Henry, and Bob

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3 years ago
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A Plane crashes into the side of a mountain. If the crash took place over 9
Julli [10]

Given parameters:

Duration of crash = 9min

Velocity before crash = 2000 yards per second

Unknown:

Acceleration of the plane = ?

Solution:

Acceleration is the change of velocity with time.

  Acceleration  = \frac{V - U}{t}

where v is the final velocity

          u is the initial velocity

          t is the time taken

We need to convert the time into seconds from min;

                      60s  = 1 min

                                So, 9min = 60 x 9 = 540s

So input the parameters and solve;

                  Acceleration = \frac{2000 - 0 }{540}  = 3.7yards/s²

The acceleration of the plane is 3.7yards/s²

6 0
3 years ago
Juan is studying a group of cells under a microscope. His teacher tells him that the cells either came from the leaf of a tomato
RoseWind [281]

Answer:

chloroplasts

Explanation:

6 0
3 years ago
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