Recent content by Kennedy111

That was litterally all of the information they gave to me. In the answer though they have: m1v1 + m2v2 = m1v1` + m2v2` (170g)(3.13m/s) + 0 = (170g)(-0.147 m/s) + (155g)(v2') v2' = 3.59 m/s I really just have no idea where they got the -0.147 m/s

Homework Statement Mass of Cue stick : 595 g Mass of White Ball: 170 g Mass of Black Ball: 155 g On the pool table, the white ball bounces off of the black ball and moves in the direction opposite to its original direction. If the speed of the white ball immediately after the collision is...

Homework Statement Calculate the shortest wavelength photon that is emitted in the hydrogen atom. Energy when n = 1 = -13.6 eV Homework Equations E = hc/λ λ = hc/E The Attempt at a Solution Well as far as I understand, when the electron is in the n = 1 energy level it has it's...

Homework Statement An electron in the 3rd stationary state around a hydrogen atom has an energy value of -1.512 eV. What will the electron's energy be if the hydrogen atom absorbs a photon with a wavelength of 1090 nm? E = -1.512 eV Homework Equations Ephoton = hc/λ The Attempt...

Homework Statement In the hydrogen atom, the electron jumps from the n = 1 level to the n = 4 level. a. During this transition from n = 1 to n = 4, is a photon emitted or absorbed? b. What is the change in energy of the electron? c. State the transition in words. d. What is the wavelength...

Okay, I understand! Thank you for your help!

If I divide that charge by 1.60 x 10^-19 C I get 72.0207 electrons. Does it have to be a whole number?

Homework Statement A 1.50 x 10^-14 kg oil drop accelerates downward at a rate of 1.80 m/s^2 when placed between two horizontal plates that are 9.40 ch apart. The potential difference between the two plates is 980 V. Determine the magnitude of the charge on the oil drop. m = 1.50 x 10^-14 kg...

Homework Statement How do the results of performing Young's experiment with x-rays and then high speed electrons support the wave-particle model? The Attempt at a Solution The experiment showed that an electron traveling at high speeds are capable of making interference patters, which is a...

Nevermind! I got it now! :D Thanks :)

Hmm... I'm not sure what I'm doing wrong then...

Homework Statement The scientist changes the frequency of the incident X-ray to 4.50 x 10^19 Hz and measures the deflected X ray frequency of 4.32 x 10^19 Hz. What was the angle of deflection? Fi = 4.50 x 10^19 Hz Ff = 4.32 x 10^19 Hz Homework Equations Δλ = λf - λi Δλ =...

Wait... was your λf value 1.06771397 x 10^-12 ?? My calculator was in radian mode...

Homework Statement An X-ray with a frequency of 3.74 x 10^20 Hz is incident on a thin piece of metal. The lower frequency X ray on the other side is observed deflected at 48°. What is the frequency fo the deflected X ray? fi = 3.74 x 10^20 Hz Deflected at 48° Homework Equations I'm...

Homework Statement To confirm the wavelength of a new laser, a scientist prepares a diffraction grating with a distance of 5.00 x 10^-6 m between slits and places it in front of the laser which is 1.50 m in front of a screen. The scientist measures the distance from the central maxima to the...