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kondaur [170]
3 years ago
5

Which of the following would decreasethe resistance to the flow of an electric current through a body? 

Physics
2 answers:
Gwar [14]3 years ago
8 0
A (shortening the conductor)
Since resistance = (resistivity × length) / cross sectional area, decreasing length decreases resistance
marissa [1.9K]3 years ago
7 0
Ohm's 2nd Law:

Resistance = ro (coefficient) x Length/Area
R = ro \times l \div a

Shortening the Conductor: Length decrease, Area become greater than Length, Ro is a constant, so it doesn't change. Result: The Resistance will be lower.

Answer: A.
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In 1 km races, runner 1 on track 1 (with time 2 min, 28.13 s) appears to be faster than runner 2 on track 2 (2 min, 28.48 s). ho
Murrr4er [49]
We are given with a velocity-distance-time kinematic problem given the different times of two runners and is asked for the difference in distances the runner has ran in the track. we use the formula v= d/t where d is the distance of running, t is time and v is the velocity of the runner. 

First runner, 
v = d/t = 1000 m / (120+28.13s ) = 6.750826976 m/s
Second runner
Using the same velocity we determine d2.
v = d2/t2 = d2 / (120+28.48s) = 6.750826976 m/s ; d2 = 1002.362789

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3 years ago
The wattage of a bulb is 24 W when it is connected to a 12 V battery. Calculate its effective wattage if it operates on a 6 V ba
tresset_1 [31]
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3 years ago
Read 2 more answers
A spinning top spinning at 16rad/s takes 88.9s to come to a complete stop. Find the angular acceleration of the top.
AURORKA [14]

Answer:

The angular acceleration of the top is 0.18 rad/s²

Explanation:

Given;

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time it takes to come to a complete stop, t = 88.9s

The angular acceleration of the top, is calculated as;

\alpha = \frac{\omega}{t}

α is the angular acceleration

ω is angular acceleration

t is the time

\alpha = \frac{\omega}{t}\\\\\alpha = \frac{16}{88.9}\\\\\alpha =0.18 \ rad/s^2

Therefore, the angular acceleration of the top is 0.18 rad/s²

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Answer:

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2 years ago
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vredina [299]

Answer:

0.5 m/s2

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