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gayaneshka [121]
2 years ago
14

What is acceleration?

Physics
1 answer:
Troyanec [42]2 years ago
8 0

Answer:

In mechanics, acceleration is the rate of change of the velocity of an object with respect to time.

Explanation:

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1.67x10^-27kg (938V/c2)

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This picture shows an example of what?
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The picture shows an example of velocity
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Assuming Faraday constant to be 96500c/mol and relative atomic mass of copper 63,calculate the mass of copper liberated by 2A cu
lisabon 2012 [21]

<u>Answer: </u>The mass of copper liberated is 0.196 g.

<u>Explanation:</u>

The oxidation half-reaction of copper follows:

Cu\rightarrow Cu^{2+}+2e^-

Calculating the theoretical mass deposited by using Faraday's law, which is:

m=\frac{M\times I\times t(s)}{n\times F} ......(1)

where,

m = actual mass deposited = ? g

M = molar mass of metal = 63 g/mol

I = average current = 2 A

t = time period in seconds = 5 min = 300 s (Conversion factor: 1 min = 60 sec)

n = number of electrons exchanged = 2

F = Faraday's constant = 96500 C/mol

Putting values in equation 1, we get:

m=\frac{63 g/mol\times 2A\times 300s}{2\times 96500 C/mol}\\\\m=0.196g

Hence, the mass of copper liberated is 0.196 g.

8 0
2 years ago
Jim stands beside a wide river and wonders how wide it is. he spots a large rock on the bank directly across from him. he then w
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To solve this problem, we must imagine that Jim’s initial position, the position of the rock, and Jim’s final position all connects to form a triangle. Now we can imagine that the triangle is a right triangle with the 90° angle on the initial position.

The angle of 30° is directly opposite to the length of his total stride while the width of the river is the side adjacent to the angle. Therefore can use the tan function to solve for the width of the river:

tan θ = opposite side / adjacent side

tan 30 = total stride distance / width of river

where total stride distance = 65 * 0.8 = 52 m

width of river = 52 m / tan 30

<span>width of river = 90.07 m</span>

7 0
3 years ago
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