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nika2105 [10]
2 years ago
8

If I traveled 30 miles in 1 hour, then 20 miles in 1 hour, and 50 miles in 3

Physics
1 answer:
Harrizon [31]2 years ago
5 0

Answer:

The answer is 20 miles/hr

Explanation:

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Four cylindrical wires of different sizes are made of the same material. Which of the following combinations of length and cross
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Answer:

Explanation:

For resistance of a wire , the formula is as follows .

R = ρ L/S

where ρ is specific resistance , L is length and S is cross sectional area of wire .

for first wire resistance

R₁ =  ρ 3L/3a = ρ L/a

for second wire , resistance

R₂ = ρ 3L/6a

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For 3 rd wire resistance

R₃ = ρ 6L/3a

= 2ρ L/a

For fourth wire , resistance

R₄ = ρ 6L/6a

=  ρ L/a

So the smallest resistance is of second wire .

Its resistance is .5 ρ L/a

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What kind of image is formed by a plane mirror
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3 years ago
HELP FAST!! Which items are matter?
babymother [125]

Battery

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Explanation:

From the given options the items that are matter are the battery and mobile phone.

What is matter?

  • Matter is anything that has weight and occupies space.
  • There are three states of matter which are solid, liquid and gas
  • A solid is a rigid body with an ordered arrangement of atom
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  • Gases are random molecules.

A battery and mobile phones are solids

learn more:

State of matter brainly.com/question/10972073

#learnwithBrainly

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