When material stuff is free to move, it moves away from stronger force on it to weaker force on it. OK ? Now take it to the next step: When material stuff is free to flow ... like liquid or gas ... it flows from higher pressure to lower pressure. That's what makes wind, and that's why water comes out of a garden hose when you open the nozzle. It doesn't amaze you at all when you INCREASE the pressure at one end of the straw (blow into it), and air moves DOWN and out of it. So it shouldn't bother you that when you DECREASE the pressure at your end, anything that's free to flow UP the straw will do that.
I believe that is true, yes!
it is true. the trajectory reaches the value of zero at the top
Answer:
The best description of inertia is an objects velocity
Answer:
re = 2.09 Å.
Explanation:
As the electron is moving around the stationary proton along a circular path at a constant speed, there exists a force that keeps the electron within this trajectory, which is the centripetal force.
This centripetal force, is no other than the attractive electric force between the proton and the electron, so we can write the following equality:
Fe = Fc ⇒ k*Qp*Qe / re² = me*ve²/re
⇒ re = k*Qp*Qe / m*ve², where:
k = 9*10⁹ N, Qp =-Qe= 1.6*10⁻¹⁹ coul, me =9.1*10⁻³¹ kg, and ve= 1.1*10⁶m/s
⇒ re = 9*(1.6)²*10⁻²⁹ / 9.1*(1.1)²*10⁻¹⁹ m
⇒ re = 2.09*10⁻¹⁰ m = 2.09 Å.