Answer
the concentration of electron/ volume (n) = 8.5 × 10²⁸ /m³
the drift velocity of electron


v = 2.615 × 10⁻⁴ m/s
time require is


t = 3231.35 s
The pressure exerted by this force is equal to 320
.
<u>Given the following data:</u>
- Area = 25
.
To calculate the pressure exerted by this force:
<h3>How to calculate pressure.</h3>
Mathematically, pressure is given by this formula:

<u>Where:</u>
Substituting the given parameters into the formula, we have:

P = 320
.
Read more on pressure here: brainly.com/question/8033367
Answer:
B. A system cannot take in additional matter.
Explanation: The total amount of energy in the universe remains constant, it can merely change from one form to another.
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The type of waves used by bats are sound waves. Most of the species use their larynx to produce ultrasound waves in the frequency range of 20 to 200 kilohertz.
These sound waves are echoed, reflected, by surroundings, in this case food or prey. These reflections are received by the specialized receptor cells in the ears of bats. The reflections are analyzed by the brain to make an image.
Fun fact: The brain cells of bats are also specialized to better analyze the frequency of ultrasound used by the bat.
Has a skateboard. your gonna have to give more details the. that just one .