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ira [324]
3 years ago
5

HELP which two changes to a metal wire both increases resistance? the answer is B but why ?

Physics
1 answer:
djverab [1.8K]3 years ago
5 0

Answer:

<h2>option C </h2><h2>decreasing its thickness and increasing its temperature. </h2>

Explanation:

<h2>Resistance is directly proportional to length and temperature of the wire and inversely to area.</h2>

<h3>if you increase the temperature the resistance will increase.(resistance is directly proportional to temperature)</h3>

<h3>if you decrease its thickness (area) then the resistance will increase ( resistance is inversely proportional to area)</h3>

hope it helps:)

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Answer: Here is the complete question:

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Where does the engery of an earthquake originate
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The speed of a 500 g cricket ball changes from 10m/s to 30m/s in just 7 seconds. What is the force acting on the cart?
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The force acting on the cart is 1.43 N.

<h3>What is force?</h3>

Force can be defined as the product of mass and acceleration.

To calculate the force acting on the cart, we use the formula below.

Formula:

  • F = m(v-u)/t................. Equation 1

Where:

  • F = Force acting on the cart
  • m = mass of the cart
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  • u = initial velocity
  • t = time

From the question,

Given:

  • m = 500 g = 0.5 kg
  • v = 30 m/s
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  • t = 7 seconds

Substitute these values into equation 1

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  • F = 10/7
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Hence, the force acting on the cart is 1.43 N.

Learn more about force here: brainly.com/question/13370981

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