Recent content by cathoderay

this athachement are part of the 1st post... it shows other parts of the same question mentioned... thanks..

hello one more thing .. the next bullet ask me the following... state whether the exponential regression model or the geometric sequence model better describes the given scenario.(explain your reasoning) what are thay asking me to do..could anyone refrace that i don't understant even wht...

Homework Statement Determine the inverse of the exponential regression equation that you foun in the first bullet. Homework Equations y=ab^x The Attempt at a Solution in the first bullet i got the equation y= (8.7166)(0.93240)^x then i found using logs that x = -5...

note: oh it looks like where there is a pi as if it was n^pi but is not ...is actually N x pie ..(the pie is timing the number infront of it.)

[SOLVED] trigonometry math 30pure Homework Statement a student is given the following sinusoidal 2 sin^2 (x)-5sinx=3 Homework Equations 1) Determine the solution to the equation , defined on the domain using a graphical approach over the domain 0 \leq x \leq 2 \pi. Give solutions as...

helo this is a homework problem i got in math 30 pure i got an answer but i would like to know how to get it by using a formula? The exercise gose like this: Initially, a pendulum swings through an arc of 2feet. On each successive swing,the length of the arc is 0.9 of the previous length...

ok..so i did..1photon has an energy of 3.16 x 10^-19J...how many photons in 1J ? (1J x 1photon)/3.16 x 10^-19J = 3.16 x 10^18 photons in 1 joul then if there are 3.16 x 10^18 photons in 1J..how many in 1.5 jouls(the total energy of the laser during the 3 second it was on)? (1.5J x 3.16 x...

well i took the 3.16 x 10^-19J and times it by the 1.5J to get the the number of photons 4.74 x 10^-19photons isn't that the answer??... Now what you mean is to time that by the output energy...wish is 1.5J Right?? that would gave me 7.11 x10^-19 ..So why do i multiply 4.74 x 10^-19 by 1.5...

oh i see now i get it ..so i will need 4.74 x 10^-19 photons to get the 1.5J... thanks..

1. hi i would like to now how i could do this? the question says: iodine-131 is a radiactive element used in the medical diagnosis and treatment of thyroid problems. iodine-131 undergoes simultaneous beta and gamma decay and has a half-life of 8.00 days. 2.im ask to write the complete...

well, energy is related to power by p=E/t E=p.t so it will be =0.50 w x 3.0s =1.5 ...so this energy released will be the #of photons? I am not sure how they are realted (energy with the emited photons)

[SOLVED] number of photons emited ..physics 30 1. hi I am having a few problems figuring what to do in this questions ..it says: A Laser Emits light of wavelenght 6.3 x 10^-7 m. 2. i need to solve for : A) What is the enrgy of each photon Emitted? B) The total power output of the...

part A & B solve thanks... part c i would like some help figuring out what I am supous to do.. thanks ..

In an accelerator, protons are accelerated through a potential difference of 1.0 x 10^6 volts. a)what is the speed of the proton when they leave the accelerator? b)When the protons enter a zinc target, the closest distance they come to a zinc nucleus is 8 x 10^-14 m. show that the force of...

Thanks..