Like I was doing this math, where I need to calculate the mass of proton while its speeding at (1/20)c.
They used the, wavelength = h/mv.
Why can't I use the, E = 1/2 mv^2 ?
https://preview.redd.it/6xwjqfkiiaw71.png?width=854&format=png&auto=webp&s=53e18a9a2bd402b72d5e87f1c893fe2df82c90a7
I'm working on a problem and I saw this (see image) equation in my textbook.
https://preview.redd.it/errogbkz86v71.png?width=483&format=png&auto=webp&s=8d12f3c035b6052f969de9b92ccb41bdf31029f1
I don't understand why the 2 is omitted in the last step. Could someone explain this?
Thanks in advance
Hi, I am a sport physiologist (far from a physicist). So this question might be laughable for some, I am really unsure if I have reasoned correctly here. I am working on an instructional paper right now on increasing punching power for boxers and I would like to explain the importance of power (force*velocity) in a simple manner.
So i'm starting with newton's second law of motion (force=mass*acceleration). I want to use this following scenario:
''Imagine getting hit by a car (Weighing 1000kg) approaching at 5km/h, despite the mass of the car, the impact would equal 1389N and you would probably be unharmed. In contrast, if you're hit by the same car but at 100km/h, the impact would equal 27778N and you would be pulverized.''
(the point being that both effective mass and speed is of importance in a boxing punch)
Is this statement overly simplified or is there any error in it? If so, any suggestions for a better practical example to explain my point?
Thanks
Hey guys! What's up?
I was thinking about flat earth and one doubt came into my mind:
Flat earth bois do not accept gravity and question Isaac Newton a lot, ok, but do they believe in the three laws? I mean, these laws are very visible in our daily life, there shouldn't be any questions for them.
That's it, I would be very glad with any answer.
Big F=ma
Would love to hear feedback on both the playing and composition. The general idea is a sort of rock theme that represents classical mechanics followed by three movements, each representing a law of motion. For example in the first law which describes inertia. my thumb acts as the "force" and the melody acts as the object which is not moving unless acted on by a force (thumb). I had a similar thing in mind with every other movement and am interested in what you guys think!
1. A business that is profitable will continue to be profitable unless impacted by an outside competitor. A business that is not profitable will continue to not be profitable unless impacted by an outside investor.
2. The change in the profitablity of a business is proportional to how much money the business was already worth right before the change and the amount of money invested in the business or lost from it to competitors right before the change.
3. For any amount of profit gained there is always an equal amount of profit lost elsewhere.
Note 1: The reason cooperation is still possible despite Newton's 3rd law of Capitalist-motion is because of the 2nd law of Capitalist-thermodynamics, which states:
Whenever monetary value is exchanged for a good or service, some of that monetary value is lost as social or psychological impact (customer satisfaction or dissatisfaction), or as time or effort.
Note 2: Obviously these laws are just loose approximations of much more complicated system dynamics and webs of sociocultural and psychological interactions. So they won't always be 100% true in every situation. Much like how the original Newton's laws are for physics.
But maybe some people will still find this useful when they're short on time, resources or personell and they don't need their business and financial decisions to be perfect.
What do you think? :)
