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krok68 [10]
3 years ago
12

What is the kinetic energy of the 80kg skydiver if he is moving at 60m/s? (Show the equation, show your work and answer with uni

ts.)
Physics
1 answer:
s344n2d4d5 [400]3 years ago
4 0

Answer:

The answer to your question is:    Ke = 144000 Joules

Explanation:

Data

Kinetic energy = ?

mass = 80 kg

speed = 60 m/s

Equation

              Ke = \frac{1}{2} mv^{2}

              Ke = \frac{1}{2} (80)(60)^{2}

             Ke = 144000 Joules

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Statement B is true.
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The apparent reversal of motion of planets against the backdrop of fixed stars is called
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The planets move eastward against the background of fixed stars with the exception of Venus, Uranus and Pluto moving westward as seen in Earth's sky . This apparent retreating movement is called Retrograde motion. It is illusion created by Earth's movement going by outer planets in their respective orbits.

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As keisha runs the generator, which best describes what should happen to the needle that measures electric current? it will move
SOVA2 [1]

The diagram shows a simple electric generator. The needle that measures electric current will move back and forth between a largely positive and a large negative value.

  • What is an electric generator?
  1. An electric generator is physically equivalent to an electric motor. but it converts mechanical energy into electrical energy.
  2. The electrical field generated is dependent on the inclination of the wire with respect to magnetic field lines, and this inclination changes over time,

because of that she will experience a varying electrical field, and thus a varying electric current will be zero.

The maximum positive value will occur when the wire is perpendicular to the magnetic field lines after one-fourth of rotation, and then zero.

Hence option C is correct.

The diagram shows a simple electric generator. The needle that measures electric current will move back and forth between a largely positive and a large negative value.

 

Learn more about electric generator here:

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6 0
2 years ago
Which tricks do you use to reduce pressure in everyday activities? Which tricks do you use to reduce pressure in everyday activi
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Answer:

same problem is here also bro i cannot find this plz help anyone

8 0
3 years ago
The ceiling of your lecture hall is probably covered with acoustic tile, which has small holes separated by about 5.9 mm. Using
timurjin [86]

Answer:

45.88297 m

Violet

Explanation:

x = Gap between holes = 5.9 mm

\lambda = Wavelength = 527 nm

D = Diameter of eye = 5 mm

L= Distance of observer from holes

From Rayleigh criteria we have the relation

\frac{x}{L}=1.22\frac{\lambda}{D}\\\Rightarrow L=\frac{xD}{1.22\lambda}\\\Rightarrow L=\frac{5.9\times 10^{-3}\times 5\times 10^{-3}}{1.22\times 527\times 10^{-9}}\\\Rightarrow L=45.88297\ m

A person could be 45.88297 m from the tile and still resolve the holes

Resolving them better means increasing the distance between the observer and the holes. It can be seen here that the distance is inversely proportional to the wavelength. Violet has a lower wavelength than red so, violet light would resolve the holes better.

5 0
3 years ago
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