Recent content by shigg927

Homework Statement Thorium (with half-life T1/2 = 1.913 yr. and atomic mass 228.028715 u) undergoes alpha decay and produces radium (atomic mass 224.020186 u) as a daughter nucleus. (Assume the alpha particle has atomic mass 4.002603 u.) The energy released from the decay of 0.6 g of...

Ahhhhh for some reason I thought I needed to now the number of nuclei, did NOT know I could just use the atomic mass. I got it, thank you!

[SOLVED] Radioactivity and radioactive decay Homework Statement Thorium (with half-life T1/2 = 1.913 yr. and atomic mass 228.028715 u) undergoes alpha decay and produces radium (atomic mass 224.020186 u) as a daughter nucleus. (Assume the alpha particle has atomic mass 4.002603 u.) What...

Simple calculation errors made a huge difference, I was dividing 35 by sqrt(1-.66^2) rather than 35/[1/(sqrt(1-.66^2))]. Thanks!

I GOT IT FINALLY! Alrighty, so, T(earth) I found using 35/gamma, getting 26.294 (and using .66c for velocity). I then found T(.9c) by dividing 26.294 by gamma using .9c and getting 60.323 hours.

No, 64.2 hours is wrong as well.

Okay, some of you guys seem to contradict one another. So...T(earth)=T(spaceship)*gamma, correct? I get 46.588 for this, but this isn't the final answer. I get a big fat "NO" for this one. so then I used T(.9c)=T(earth)*gamma, using .9c here and using .66c above, getting 106.880 hours. Still...

(But this is wrong, but I don't know why)

Using the equation delta T= gamma*delta(Tproper)... delta T= 1/(sqrt(1-.9^2))*35 hours, getting about 81 hours.

[SOLVED] Time Dilation-AHH! So, I feel like this should be a simple problem, but according to my online homework, none of the answers are correct. Here's the problem: A spaceship is moving at 0.66 c (0.66 times the speed of light) with respect to the earth. An observer on the spaceship...

[SOLVED] Kirchoff's Laws Homework Statement "The circuit in the figure is composed of two batteries (ε1 = 8 V and ε2 = 4 V) and four resistors (R1 = 110 Ω, R2 = 40 Ω, R3 = 50 Ω, and R4 = 50 Ω) as shown. What is the current I1 which flows through R1? What is the current that flows through...