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pav-90 [236]
2 years ago
9

A sound wave has a wavelength of 15 meters with a frequency of 2.5 Hz. What would the velocity be for this situation in

Physics
1 answer:
rodikova [14]2 years ago
7 0

Answer:

6m/s

Explanation:

V = frequency * wavelength

15 * 2.5 = 6m/s

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(c) A moving train has a kinetic energy of 8.1 x 10(power of 6)J.
tamaranim1 [39]

the friction force provided by the brakes is 30000 N.

<h3>What is friction force?</h3>

Friction force is the force that opposes the motion between two bodies in contact.

To calculate the average friction force provided by the brakes, we apply the formula below.

Formula:

  • K.E = F'd............. Equation 1

Where:

  • K.E = Kinetic energy of the train
  • F' = Friction force provided by the brakes
  • d = distance

Make F' the subject of the equation

  • F' = K.E/d............ Equation 2

From the question,

Given:

  • K.E = 8.1×10⁶
  • d = 270 m

Substitute these values into equation 2

  • F' = (8.1 ×10⁶)/270
  • F' = 30000 N

Hence, the friction force provided by the brakes is 30000 N

Learn more about friction force here: brainly.com/question/13680415

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2 years ago
greater than: The electric potential energy of a proton at point A is _____ the electric potential energy of an proton at point
mestny [16]

Answer:

[similar to]

Explanation:

it is the missing word

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What is the best definition of vectors?
mariarad [96]

Answer:

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