# VeritasVosLiberabit

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1. ## Gravitational constant

ah I see now. y = kx -> F = G( m*M/r^2) y = F = N = (kgm)/s^2 x = (m*M)/ r^2 = kg^2/m^2 k = y/x -> G = [(kgm)/s^2]/(kg^2/m^2) = [(kgm)/s^2](m^2/kg^2) = m^3/s^2kg or m^3 kg^-1 s^-2 should have done this mathematically from the beginning instead of trying to use intuition, thanks for pointing this out.
2. ## Gravitational constant

So I have really been pondering this question for the past few weeks to find the relationship between this constant 'G' and its relationship in the equation for the force of gravity between two massive bodies. The equation for a proportionality relationship is y = kx. This formula looks familiar because Hooke's law is nearly identical to this except 'k' is made negative (not sure why but perhaps because spring rest is 0 in cartesian plane and spring force direction opposite of x?). Anyway, 'k' represents a constant and a constant is a variable used to show a relationship between two or more co
3. ## Gravitational constant

I have some questions regarding the gravitational constant and Newton's theory of gravity. To start, I am a first year physics undergrad student just so you have a sense of my caliber of understanding. Here is my question. As I understand Newton was able to come up with an equation for the gravitational force of attraction between any two massive bodies F= (M1*m2)/d^2 Later, Henry Cavendish invented an experiment in order to find the gravitational constant (6.673 * 10^-11 kg^-1*m^3*s^-2), originally intended to find the density of Earth, which happened a number of years after Newton's death.
4. ## Understanding the atom

I had some questions about the atom that hopefully some of you may be able to answer. First question: How is it that electrons don't attract to protons within the nucleus and just annihilate with each other? They both have 1.6*10^-19 C charge that would attract one another. The only thing I could think of is there is some other type of force repelling the the electrons from the nucleus? This is just a guess at trying to explain this phenomenon. Second question: Why are electrons confined to specific energy levels? I don't understand how an electron can only be at specific distances fro

Hello scienceforums community. I'd like to introduce myself to start because I am somewhat of a new member. I am a physics undergrad but I'm very fresh into the realm of physics. I would like to ask some questions I've had about magnetism in order to give some better insight into what it is exactly. 1) Of course when talking about magnetism you have to talk about electricity. The equation B = {(mu)(I)}/ {2(pi)r} is an equation used to compute the magnetic field induced by a current carrying wire. I was curious to know what exactly mu (the permeability constant) represents in the equation
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