Recent content by P1nkButt3rflys

I was thinking: At=Ao*e^[-λ*t] Ao=7340 particles/sec λ=1.15e-8 s^-1 But that leaves me with two unknowns. I'm assuming I need to find At, to relate it to the amount electroplated onto the copper, but don't have t. Still stuck :(

I'm not sure. I feel like I'm missing a formula

I got the first part A) T=1.913y = 6.037e7 sec λ=(0.693/6.037e7) λ=1.15e-8 s^-1 but I have no idea where to start with part b. Any suggestions?

Homework Statement A small quantity of the thorium isotope Th(A=228, Z=90) (half-life 1.913 y) is prepared and electroplated onto a thick sheet of copper and overcoated with a thin film of gas-tight polymer. The plating and coating are both thin enough so that none of the alpha particles...

Electrons accelerated by a potential difference of 13.14 V pass through a gas of hydrogen atoms at room temperature. A) Calculate the wavelength of light emitted with the longest possible wavelength. B) Calculate the wavelength of light emitted with the shortest possible wavelength. I've...

A) The graph shows V-I curves for two conductors. One is measured for a carbon resistor and obeys Ohm's law; the other is for a light-emitting diode (LED) and shows non-ohmic behaviour. What is the resistance of the carbon resistor? B) For what value of current is the resistance of the LED...

15 attempts are allowed. I'm glad I was able to figure it out and understand the reasoning behind each one.

I figured it out after looking at it again. 4) Is false when I assumed it was True. All answers are False :) Thank you for taking the time to read this regardless!

Answer true/false to the following statements about parallel-plate capacitors. 1) The charges on the two plates of a capacitor are equal. 2) Capacitance is the property of a device that enables it to store current. 3) The capacitance of a parallel-plate capacitor is proportional to the...

Thanks for the suggestion! I used your equation and got the same result, well, almost. The force for x was the same, the force for y was 0.134 N, so I must have had an issue with my sig figs. I entered both answers and they are correct! Thank you for your help!

Attempted B, to find the force on q3 and it is incorrect. Any suggestions:

So not only did I use some wrong values in my previous calculation, after reading through my textbook further I approached it differently and got the correct answer for Part A :) I'm not sure what to do for Part B, but am going to attempt it and post my work.

Hi again jackarms! No we haven't learned those concepts yet, we got this assignment about 1 week early and I was trying to be keen. I'm going to read ahead and see if I can figure this out. Thank you!

Hi jackarms! Thanks for the help but I'm still very confused. I attempted another solution, again it's wrong.. I'll post my attempt and maybe someone can give me some guidance. I'm not sure if I'm on the right track or completely off in the wrong direction. [IMAGE REMOVED] Thank you!

Homework Statement The diagram shows the electric field lines surrounding three electric charges. Assume that q1 + q2 = -2.43 µC. A) Calculate q2. B) Calculate q1. C) Calculate q3. Homework Equations |Fe|= (k*|q1|*|q2|)/r^2 |E|=(k*|Q|)/r^2 k = 8.99*10^9 (N*m^2)/C^2...