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omeli [17]
3 years ago
13

If you were designing a cord for a television using two materials with different levels of electrical conductivity, for safety y

ou would place the substance with ________ conductivity __________ the cord.
Physics
2 answers:
torisob [31]3 years ago
6 0

Low, Outside

I know because i just did it on Study Island.

Semmy [17]3 years ago
6 0

Answer:

with <u>lower</u> conductivity <u>outside</u> the cord.

Explanation:

Electrical conductivity is the property of a material which determines how much it can conduct the electric charges across it.

Good electric conductors are used to make electric wires like copper. Usually, a material with low conductivity that is poor  conductor of electricity, is used to coat the electric wire to avoid accidental damage like plastic.

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The vectors of the magnetic field around a long, straight, current-carrying wire are:
pochemuha

Answer:

concentric with the wire

Explanation:

the magnetic field around a long straight, current carrying wire form concentric circles around the wire.

7 0
3 years ago
A 55 kg track and field athlete has an average power output of 5.4 kW during the 200 meter dash. How quickly did she finish the
olga_2 [115]

The time taken for the athlete to finish the race is 20 s (Option A)

<h3>What is power? </h3>

Power is simply defined as the rate at which work is done. It can be expressed mathematically as

Power (P) = work (W) / time (t)

But

Work = weight × distance

Therefore,

Power = (weight × distance ) / time

<h3>How to determine the time </h3>
  • Mass (m) = 55 Kg
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Weight = mg = 55 × 9.8 = 539 N
  • Power (P) = 5.4 KW = 5.4 × 1000 = 5400 W
  • Distance (d) = 200 m
  • Time (t) =?

Power = (weight × distance ) / time

5400 = (539 × 200) / t

5400 = 107800 / t

Cross multiply

5400 × t = 107800

Divide both side by 5400

t = 107800 / 5400

t = 20 s

Learn more about power:

brainly.com/question/5684937

#SPJ1

5 0
2 years ago
Give an example of Newton's 1st law​
Vesna [10]

Answer:

A ball moving until gravity pulls it back down to the ground

Explanation:

5 0
3 years ago
A myopic person has a far point of 1.000m. If she wears her eyeglass 2.0cm in fromt of here eyes, what is the power of her eye g
Iteru [2.4K]

Answer:

51 dioptre

Explanation:

u = Object distance =  2 cm

v = Image distance = 1 m

f = Focal length

Lens Equation

\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}=\frac{1}{0.02}+\frac{1}{1}\\\Rightarrow \frac{1}{f}=\frac{1.02}{0.02}\\\Rightarrow \frac{1}{f}=51\\\Rightarrow f=\frac{1}{51}

Power of lens

P=\frac{1}{f}\\\Rightarrow P=\frac{1}{\frac{1}{51}}\\\Rightarrow P=51\ D

Power of the eye lens is 51 dioptre.

5 0
3 years ago
Define absorption and explain why it makes light dimmer as it travels farther away
ale4655 [162]

Answer:

the process or action by which one thing absorbs or is absorbed by another.

Explanation:

bc it spreeds out more the farther away it gets

8 0
3 years ago
Read 2 more answers
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