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lord [1]
3 years ago
10

Which statement about phase changes is TRUE?

Physics
1 answer:
forsale [732]3 years ago
6 0

Answer:

Phase changes can be reversed

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Why are you teachers regarded as professionals​
Murljashka [212]

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coz teaching is their profession.

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4 years ago
Describe the relationship between a moving objects mass and its kinetic energy
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KE = 1/2 mv^2 is the relationship betwee mass and kinetic energy
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In this electric motor, an electric current causes the coil to rotate, changing
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Jessie and Jaime complete a 5.0 km race. Each has a mass of 68 kg. Jessie runs the race at 15 km/h; Jaime walks it at 5 km/h. Ho
Leto [7]

The total metabolic energy used by each to complete the course is determined as 656.91 J.

<h3>Kinetic energy of Jessie and Jaime</h3>

The kinetic energy of Jessie and Jaime is calculated as follows;

K.E = ¹/₂mv²

where;

  • m is mass of Jaime
  • v is speed

15 km/h = 4.17 m/s

5 km/h = 1.39 m/s

K.E = ¹/₂(68)(4.17)² + ¹/₂(68)(1.39)²

K.E = 656.91 J

Thus, the total metabolic energy used by each to complete the course is determined as 656.91 J.

Learn more about kinetic energy here: brainly.com/question/25959744

5 0
2 years ago
A uniform film of a material that has index of refraction 1.30 covers the front surface of a pane made of glass with index of re
Orlov [11]

Answer:

The energy of each photon in the light beam is 1.73\times10^{-18}\ J.

Explanation:

Given that,

Index of refraction of glass =1.55

Index of refraction of material =1.30

Wavelength = 115 nm

We need to calculate the energy of each photon in the light beam

Using formula of energy

E=\dfrac{hc}{\lambda}

Where, h = Planck constant

\lambda=wavelength

c = speed of light

Put the value into formula

E=\dfrac{6.63\times10^{-34}\times3\times10^{8}}{115\times10^{-9}}

E=1.73\times10^{-18}\ J

Hence, The energy of each photon in the light beam is 1.73\times10^{-18}\ J.

3 0
4 years ago
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