If you wanted to enjoy longer periods of daylight in the summertime, would you head closer to the equator or farther from it? Wh
1 answer:
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Answer:
a)<em> It took 1.28 seconds to Neil Armstrong's voice to reach the Earth via radio waves. </em>
b) <em>The minimum time that will be required for a message from Mars to reach the Earth via radio waves is 192 seconds. </em>
Explanation:
The electromagnetic spectrum is the distribution of radiation due to the different frequencies at which it radiates and its different intensitie. 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:
- Gamma rays
- X-rays
- Ultraviolet rays
- Visible region
- Infrared
- Microwave
- Radio waves.
Any radiation that belongs to electromagnetic spectrum has a speed in vacuum of .
<em>a) Find the time it took for his voice to reach the Earth via radio waves.</em>
To know the time that took for Neil Armstrong's voice to reach the Earth via radio waves, the following equation can be used:
(1)
Where v is the speed of light, d is the distance and t is the time.
Notice that t can be isolated from equation 1.
(2)
The distance from the Earth to the Moon is , therefore.
Hence, it took 1.28 seconds to Neil Armstrong's voice to reach the Earth via radio waves.
<em>b) Determine the minimum time that will be required for a message from Mars to reach the Earth via radio waves.</em>
The distance from the Earth to the Mars at its closest approach is , therefore.
Hence, the minimum time that will be required for a message from Mars to reach the Earth via radio waves is 192 seconds.
Answer:
The acceleration of is
Explanation:
From the question we are told that
The mass of first block is
The angle of inclination of first block is
The coefficient of kinetic friction of the first block is
The mass of the second block is
The angle of inclination of the second block is
The coefficient of kinetic friction of the second block is
The acceleration of are same
The force acting on the mass is mathematically represented as
=>
Where T is the tension on the rope
The force acting on the mass is mathematically represented as
At equilibrium
So
making a the subject of the formula
substituting values
=>