Recent content by grscott_2000

Hi, I've been asked to find the transverse velocity of a star. It has a proper motion of 0.249 arcsec/yr and it is at a distance of 23.8 parsecs. Now I am happy with the formula to use (vt = d x sin(mu)) but I am not sure of the units I am supposed to be using. I've plugged these values...

Of course... Z is the value for the atomic number which is the number of protons in a nucleus... Sorry, missed that one! But thankyou... it was the equation I was looking at

Hi, Can someone clarify for me the terms used in the Gamow energy equation. I know mr = reduced mass, c= speed of light etc, but what is puzzling me are the terms Za and Zb. I thought that these were the charges (I have been asked to find the Gamow energy of two protons). My answer...

Many thanx... Thats just what I was looking for. Things should be straightforward now, well as straightforward as integration can be i suppose! Again many thanks for the help

Not so much a question query here but a query about how my question is written. Im having to do some integration and my question has one part loge (log sub e). I think that this is just natural log which i usually see written as ln(x). Is this correct? However my table of integrals has...

Hi... Apologies if this is in the wrong section but it is kind of homework related. I'm looking at an ultraviolet image of the sun... Would I be right in saying that brighter areas represent higher temperatures and darker regions represent lower teperatures?

If we have a function of the form Ln(ax) Is it the case that the derivative is simply 1/x no matter what the initial value of 'a' might be? Or do we take into account 'a' in some way The thing i need clarifying is this... If we have Ln(3x), the derivative is 1/x, but the integral of...

I was just wondering if there was a formal statement that I was missing here. My textbooks indicate that the equation is the law, but you're right, there's nothing wrong with giving it in that form. As usual, many thanks.

I have been asked to "state snells law" I know the equation is sin i / sin r = n2/n1 And I know how to use it... But is there a written law for this that I'm missing? (As in Newtons third law of motion states that...?)

Many thanks for your assistance

yes that's exactly it... potential difference(100V) x charge of electron(q). I understand that relativistic formulas are used when the particles speed become close to the speed of light. Is this right? Otherwise the classic Newtonian formula 1/2 mv^2 can be used?

I see... So if I have calculated the kinetic energy of an electron to be for example 6 x 10^-12J, then I can calculate the total energy as (6 x 10^-12J) + mass of electron * speed of light^2 ? And once this is established I can use one of the formulas to give me v?

Would that be Ek as in translated kinetic energy?

I have a question here where a potential difference is applied to a stationary electron. I have calculated the energy translated to the electron already and I know the mass energy of the electron. If I want to find its final speed I assume that I use a rearrangement of the relativistic...

If I know the charge on a particle and I know that it has initial speed of zero and I also know that it is passed through a potential difference of 100kV, can I say that its change in kinetic energy is deltaE = charge of particle(q) x potential difference(100kV) Or is this equation just...