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emmasim [6.3K]
3 years ago
15

17)

Physics
1 answer:
lina2011 [118]3 years ago
4 0

17 , d . because a force is being applied but it is not moving .

19 . is c .

20 .b .

21 . d .

31 . d .

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When a nerve cell depolarizes, charge is transferred across the cell membrane, changing the potential difference. For a typical
laila [671]

Answer:

I = 18 x 10⁻⁹ A = 18 nA

Explanation:

The current is defined as the flow of charge per unit time. Therefore,

I = q/t

where,

I = Average Current passing through nerve cell

q = Total flow of charges through nerve cell

t = time period of flow of charges

Here, in our case:

I = ?

q = (9 pC)(1 x 10⁻¹² C/1 pC) = 9 x 10⁻¹² C

t = (0.5 ms)(1 x 10⁻³ s/1 ms) = 5 x 10⁻⁴ s

Therefore,

I = (9 x 10⁻¹² C)/(5 x 10⁻⁴ s)

<u>I = 18 x 10⁻⁹ A = 18 nA</u>

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3 years ago
Problem A spring was at its resting position where it is attached to a wall at its left side and a block at its right side as sh
puteri [66]

Answer:

F = 19.1 N

Explanation:

To find the force exerted by the string on the block you use the following formula:

F=kx  (1)  

k: spring constant = 95.5 N/m

x: displacement of the block from its equilibrium position = 0.200 m

you replace the values of k and x in the equation (1):

F=(95.5N/m)(0.200m)=19.1N

Hence, the force exterted on the block is 19.1 N

 

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An atom that has an excess positive or negative electrical charge caused by the loss or addition of an electron is called a(n)
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Answer:

ion

Explanation:

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Melting, freezing, and boiling are _____________ changes. Question 3 options: A. compound
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Melting freezing and boiling are molecular changes


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5. Кульки із сталі, чавуну, міді і латуні мають однакові розміри. Яка з них має
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Sorry, I don't understand this language, sorry dear

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2 years ago
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