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xxMikexx [17]
3 years ago
10

A copper wire of length 4.00 cm and radius 4.00 mm has a potential difference of 4.00 nV across the ends of the wire. Calculate

the amount of charge in microCoulombs) drifting through the cross section in 4.00 ms. Assume the resistivity of copper is 1.70 x 10-8 Ohm-meters.
1. 101.88
2. 1.18
3. 0.59
4. 41.40
5. 66.35 [10 points]

Physics
1 answer:
Marrrta [24]3 years ago
5 0

Answer: The amount of charge in microCoulombs is 1.18 ( Q = 1.18µC).

The correct option is 2

Explanation: Please see the attachments below

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Answer:

The current through it will also decrease to half of its former value because according to Ohm's law the current flowing through a resistor is directly proportional to the potential difference applied across its ends provided that the temperature and some other necessary conditions remain constant.

This is mathematically represented as follows;

V=IR.........(1)

The current is thus given as

I=\frac{V}{R}..............(2)

if R is constant and V is reduced to half, then we have the following;

I=\frac{V/2}{R}

Simplifying further we obtain

I=\frac{V}{2R}...........(3)

Equation (3) shows that the current I is also reduced to half.

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2 years ago
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The maximum gauge pressure in a hydraulic lift is 18.0 atm what is the largest size vehicle
victus00 [196]
There is a missing part in the question. Found the complete text on internet:
"<span>What is the largest size vehicle (kg) it can lift if the diameter of the output line is 28.0 cm? "

Solution
The diameter of the piston is 28.0 cm, this means its radius is 14.0 cm (half the diameter), so the area of the piston is
</span>A=\pi r^2 = \pi (0.14 m)^2 =6.15 \cdot 10^{-2} m^2
<span>
The maximum pressure of the lift is
</span>p=18.0 atm = 1.82 \cdot 10^6 Pa
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Therefore the maximum force the piston can lift is
</span>F=pA=(1.82 \cdot 10^6 Pa)(6.15 \cdot 10^{-2} m^2)=1.12 \cdot 10^5 N
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And the size (the mass) of the vehicle is
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3 0
3 years ago
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surfac
Sedbober [7]

Answer:

v = 1.2 m/s

Explanation:

The wavelength of the waves is given as the horizontal distance between the crests:

λ = wavelength = 5.5 m

Now, the time period is given as the time taken by boat to move from the highest point again to the highest point. So it will be equal to twice the time taken by the boat to travel from highest to the lowest point:

T = Time Period = 2(2.3 s) = 4.6 s

Now, the speed of the wave is given as:

v = f\lambda

where,

v= speed of wave = ?

f = frequency of wave = \frac{1}{T} = \frac{1}{4.6\ s} = 0.217\ Hz

Therefore,

v = (0.217\ Hz)(5.5\ m)\\

<u>v = 1.2 m/s</u>

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2 years ago
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motikmotik

Explanation:

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earnstyle [38]
A group of cells together
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