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Verdich [7]
3 years ago
13

A girl who is watching a plane fly tells her friend that the plane isn't moving at all. Describe a frame of reference in which t

he girl's description would be true.
Physics
2 answers:
Dafna1 [17]3 years ago
6 0
If the plane is far away and flying directly toward or away from
the girl, the plane would appear not to be moving. Also, the plane
would not be moving in the frame of reference of the people on
the plane. If you are matching speed and direction of the plane.
Ierofanga [76]3 years ago
3 0
There are no points of reference like trees, or buildings for us to calculate the rate of speed it takes the object and our eye muscles are not good at keeping a steady gaze.
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Calculate the wavelength of a photon of electromagnetic radiation with a frequency of 151.7 mhz
AlekseyPX

The wavelength of a photon of electromagnetic radiation with a frequency of 151.7 Mhz is 1.978 meter

According to the question

The frequency of a photon of electromagnetic radiation = 151.7 Mhz

By using the Formula of wavelength and frequency

λ = C/f

Where,

λ (Lambda) = Wavelength in meters

C = Speed of Light (c = 3x10⁸ m/s)

f = Frequency

Now, the wavelength of a photon of electromagnetic radiation with a frequency of 151.7 Mhz is  

1 Mhz = 1000000 Hz

151.7 Mhz = 151.7 * 10⁶ Hz

λ = C/f  

Substituting the value of C and f  

  λ =  \frac{3*10^{8} }{151.7 * 10^{6}  }

  λ = 1.978 meter

Hence,  the wavelength of a photon of electromagnetic radiation with a frequency of 151.7 Mhz is 1.978 meter

To know more about  wavelength and frequency here:

brainly.com/question/18651058

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5 0
2 years ago
In the final situation below, the 8.0 kg box has been launched with a speed of 10.0 m/s across a frictionless surface. Find the
Murljashka [212]

Answer:

the energy of the spring at the start is 400 J.

Explanation:

Given;

mass of the box, m = 8.0 kg

final speed of the box, v = 10 m/s

Apply the principle of conservation of energy to determine the energy of the spring at the start;

Final Kinetic energy of the box = initial elastic potential energy of the spring

K.E = Ux

¹/₂mv² = Ux

¹/₂ x 8 x 10² = Ux

400 J = Ux

Therefore, the energy of the spring at the start is 400 J.

8 0
3 years ago
Which one of these birds is an experimental population
kkurt [141]

Answer Whooping Crane

An experimental population is a geologically depicted gathering of reintroduced plants or creatures that is segregated from other existing populaces of the species. It is done to protect the endangered species from getting extinct. Whooping crane is also one of those birds which were endangered and experimental population technique was used.

4 0
3 years ago
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Setler79 [48]
The slope of an object is given relative to an origin.
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4 years ago
Where does subduction occur?
prisoha [69]

The correct answer is <u>B. Where crust is destroyed.</u>

6 0
3 years ago
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