Recent content by NikkiNik

Homework Statement In the following exoergic nuclear reaction, 12D + 13T &rarr 01n + 24He what percentage of the initial mass is converted into energy? Homework Equations (mA +ma)- (mB-mB) =delta m delta m * u(MeV) = E The Attempt at a Solution I'm not sure how...

Homework Statement What initial kinetic energy must an alpha particle have if it is to approach a stationary nickel nucleus to within a distance of 24.6 fm? Homework Equations not sure The Attempt at a Solution I'm not really sure how to connect the KE with the distance of the...

Ok I see but why would both of the signs be negative and not only one?? Is it because they are going in opposite directions

Homework Statement Electrons are accelerated from rest through a potential difference of 250000 V. What is the final speed predicted classically? What is the final speed predicted relativistically? Homework Equations KE=0.5mv^2 KE=mc^2-m0c^2 The Attempt at a Solution...

yes I did (.4c)-(-.6c) =1c then I didvided by (1 +(-.24c^2/c^2)=0.76 I divided the first answer by the second and got 1.316c ?

So the relativistic density is 1634 kg ( at least that's what I calcuated) Then I converted 1cm to meters and found the relativistic length which was 6.1182e-3 m then i cubed it to find volume and got 2.29e-1m^3 Next I found the density by diving the new mass by the new volume and got...

Sorry one more question...if I add the velocities at the top then it would be 1/7.6e-1 and the answer would be 1.32c which I don't think is right. And if I solved it the first way, the answer being 0.263c (positive or negative) is incorrect...what am I doing incorrect?? Sorry I keep replying so...

Oh ok

Ok I solved it the way you said and I got 2.63e-1c but that's not right. I even got the same answer when I solved it my way?

Thanx!

Homework Statement Deep Space Nine sees Enterprise and a shuttle approach from exactly opposite directions with 0.6 c and 0.4 c, respectively. At what fraction of the speed of light (b) does Enterprise see the shuttle approach? Homework Equations V2=(v1+ v1,2)/[1 +(v1*v1,2/c^2)] The...

Homework Statement A cube, one cm on an edge, is filled with pure water. As measured in a reference frame at rest relative to the cube, the density of the water is exactly 1000.0 kg/m3. The cube is now accelerated to a constant speed of 0.791c. What is the density of the water in the moving...

Homework Statement Calculate the binding energy of a neutron in 14N Homework Equations E=mc^2 delta m * 1u + E The Attempt at a Solution The mass of Nitrogen (from periodic table): 14.007amu Calculated mass of N: 7 protons (7 * 1.007277amu) + 7 neutrons (7* 1.008665amu) +...

Homework Statement The figure illustrates qualitatively a converging lens focusing monochromatic rays from A to B. The vertical and horizontal scales of the figure are not the same. The top ray leaves A at an angle of 2.38 deg above the optic axis and leaves B at an angle of 1.25 deg below the...

I found in the equations in my book (1) (sin(α + δ))/2 = n*sin(α/2) All I'm given is the apex angle and n and I'm not sure where to go from there. Since I'm not supposed to find the critical angle I'm not sure how to go about finding the incident angle.