Answer:
All of the above
Explanation:
Astronomers use all of those measures to classify stars. If you want to look more into classifying stars, check out the Hertzsprung-Russel Diagram. It covers how to identify red giants, main sequence, dwarf stars, ect. Distance from earth is typically measured in light years. The color of stars generally determines how hot they are. (Blue stars are the hottest) Also, the parallax method is used to measure stars that are closer to earth. This method relies heavily on geometry though.
Hope this helped!
Scientific evidence such as reflection and photoelectric effect has proven the wave-particle model of electromagnetic radiation to be true.
<h3>What is electromagnet radiation?</h3>
Electromagnetic radiation is radiation produced as a result of the interactions of the electric and magnetic fields.
Some forms of electromagnetic radiation include:
- radio waves
- microwaves
- ultraviolet radiation
- visible light
Electromagnetic radiation can be described using a wave model or a particle model.
The wave property of electromagnetic radiation include:
- diffraction
- reflection
- refraction
The particle property of electromagnetic radiation include:
- photoelectric effect
- Compton effect.
Therefore, the wave-particle model of electromagnetic radiation is correct because it can be backed up by experiments and evidence.
Learn more about wave-particle model at: brainly.com/question/20452331
Answer:
Answer is 717 N . m
Refer below for the explanation.
Explanation:
As per the question,
38 mm diameter shaft,
Yield strength 250 mpa,
P 240kn.
Refer to the picture for complete explanation.
Your speed when your car hits a fixed object is 60 mph.
The given parameters:
- Your initial speed, v = 60 mph
<h3>What is relative velocity?</h3>
Relative velocity tells us how fast we are traveling from a fixed point or reference point.
- When travel at 60 mph in a car, you are moving at the same rate with the car.
- If you are not wearing a seat belt, when you hit a fixed object, you will move forward at the same rate as the car's speed.
Thus, we can conclude that your speed when your car hits a fixed object is 60 mph.
Learn more about relative velocity here: brainly.com/question/17228388
