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sasho [114]
3 years ago
5

If a hockey player starts from rest and accelerates at a rate of 2.1 m/s², how long does it take him to skate 30 m?

Physics
1 answer:
Vlada [557]3 years ago
5 0

Answer:

its A i think im not sure tho

Explanation:

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Which of electromagnetic radiation has the shortest wavelength?
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Answer:

The electromagnetic radiation with the shortest wavelength are gamma rays.

Explanation:

Photons are the particles that constitute light and its kwnow that lights propagates as electromagnetic waves.

The electromagnetic spectrum is the distribution of radiation due to the different frequencies at which it radiates and its different intensities, that radiation is formed by electromagnetic waves, which are transverse waves formed by an electric field and a magnetic field perpendicular to it.

The distribution of the radiation in the electromagnetic spectrum can also be given in wavelengths, but it is more frequent to work with it at frequencies, the highest being that of gamma rays, followed by X-rays, ultraviolet rays and the visible region , and those of lower frequencies, which correspond to infrared, microwave and radio waves.        

The energy given for each wavelength can be found by means of the following equation.

E = h\nu  (1)

but c = \lambda \cdot \nu

\nu = \frac{c}{\lambda}

E = \frac{hc}{\lambda}   (2)

Where E is the energy, h is the planck's constant and \lambda is the wavelength.

                   

So, it can be see in equation 2 that when the wavelength increases the energy decreases (inversely proportional).

Hence, the electromagnetic radiation with the shortest wavelength are gamma rays.

   

4 0
2 years ago
How did new technology such as the telescope and new theories such as Pascal's Law laid the foundation of the Scientific Revolut
AfilCa [17]

Answer:

"Scientists used them to create new theories"

Explanation:

The Scientific Revolution was a sequence of actions that manifest the development of contemporary science through the early contemporary period, when advances in mathematics, physics, astronomy, biology and chemistry altered the opinions of civilization around nature. The scientific revolution denotes to the quick developments in European scientific, mathematical, and political assumed, grounded on a new philosophy of experimentation and a belief in growth that defined Europe in the 16th and 17th centuries.

4 0
3 years ago
What causes the change from day to night?
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Earths Rotation
Earth's rotation is the rotation of Planet Earth around its own axis. Earth rotates eastward, in prograde motion. As viewed from the north<span> pole star Polaris, Earth turns counter</span>clockwise<span>. </span>
"AB84"
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3 years ago
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PLS ANSWER FAST WILL GIVE BRAINLY TIMED TEST
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A=F/m
a=(3000000)/(20000)
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2 years ago
If javier has a car thats 250,000 kg and a forse of 300 newtons.what would be the accleration.
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Answer:

The acceleration would be 3.455.

3 0
3 years ago
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