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Elis [28]
3 years ago
14

A bare 4 AWG copper conductor Installed horizontally near the bottom or vertically, and within that portion of a concrete foun d

ation or footing that is In direct contact with the earth, can be used as a grounding electrode when the conductor is at least __________ft in length.
Physics
1 answer:
neonofarm [45]3 years ago
4 0

Answer:

20 ft

Explanation:

This is the length where the direct contact could be used as ground electrode

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Is the distance traveled during a specific unit of
Anton [14]

Answer:

velocity

Explanation:

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4 0
3 years ago
Lee has a mass of 40.0 kg and ice skates with a speed of 4.6 m/s.
faltersainse [42]

Their common speed is 1.53 m/s.

<h3>What is speed?</h3>

Speed can be defined as the ratio of the distance to the time of a body in motion.

  To calculate their final speed, we use the formula below.

Formula:

  • mu+m'u' = V(m+m')............. Equation 1

Where:

  • m = mass of the Lee
  • m' = mass of Mat
  • u = initial speed of Lee
  • u' = initial speed of Mat
  • V = Their common speed.

make V the subject of the equation

  • V = (mu+m'u')/(m+m')........... Equation 2

From the question,

Given:

  • m = 40 kg
  • m' = 80 kg
  • u = 4.6 m/s
  • u' = 0 m/s

Substitute these values into equation 2

  • V = [(40×4.6)+(80×0)]/(40+80)
  • V = 184/120
  • V = 1.53 m/s.

Hence, Their common speed is 1.53 m/s.

Learn more about speed here: brainly.com/question/3004254

6 0
2 years ago
A centimetre is ___ meter(s)
enyata [817]
A centimetre is 0.01 meters.
5 0
2 years ago
Please help me with this! (:
tiny-mole [99]

Answer:

(A) 18 km/h

Explanation:

4.9\frac{m}{s}=4.9\cdot \frac{\frac{1}{1000}km}{\frac{1}{3600}h}=4.9\cdot3.6\frac{km}{h}=17.64\frac{km}{h}\approx18\frac{km}{h}

8 0
2 years ago
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