Recent content by dannie

Homework Statement Describe two considerations when building a nuclear reactor that would minimize the environmental impact of the nuclear fission reaction. Homework Equations I could think of one. is it even correct? The Attempt at a Solution The reaction needs to be kept in a...

Homework Statement The half life of americium-241 is 457.699 years. A typical smoke detector contains 33.1 kBq of americium-241. Determine the amount of americium-242 remaining after 15 years. Homework Equations A=Aoe - - 0.693t/T 1/2 The Attempt at a...

Homework Statement Two large , horizontal charged plates are separated by 0.050m. A small plstic sphere is stationary and suspended between them and is experiencing an electric force of 4.5x10^-15 N. What is the mass of the sphere? F=ma My attempt. F=4.5x10^-15N a=9.8m/s^2...

describe results of performing young's experiment with x-rays and then high speed electronics. my answer: The wave particle duality is established by using his experiment. Can someone help me to add on? thnx :)

A stationary hydrogen atom with a mass of 1.67 x10^-27 kg absorbs a photon of light with an energy of 10.2eV.What is the velocity of the hydrogen atom after absorbing the photon? This is my question: Is it true that the atom has no speed since all the energy is completely absorbed at the...

What quantity measured in the Compton effect experiment shows the wave- particle duality of light? the momentum shows the wave particle duality of light. is this true? The Compton Effect is An increase in wavelength of X-rays or gamma rays that occurs when they are scattered.

Provide one of the following answers: PE,CS, BOTH, OR NEITHER. PE if the statement applies only to Photoelectric Effect. CS if the statement applies only to Compton Scattering BOTH if the statement applies only to both the Photoelectric Effect and Compton Scattering. NEITHER if the...

According to Maxwell's Laws of electromagnetism , the orbital frequency (the number of complete orbits per second) of an electron will match the frequency of the emitted radiation. if an electron spirals into the nucleus, what would happen to the frequency of the emitted radiation...

According to Maxwell's Laws of electromagnetism , the orbital frequency (the number of complete orbits per second) of an electron will match the frequency of the emitted radiation. If an electron spirals into the nucleus, what would happen to the electron's orbital frequency? This is what...

time= speed of sound/distance or s= m/s / m dont the the meters cancel out? giving seconds?

When welder are working on pipelines, they use filters that block out UV light. Why is this precaution necessary? Does the question mean that they wear some type of glasses to help protect their eyes? or does the filter block UV light from going into the pipeline? This is what I...

Describe the pattern of intensity vs wavelength observed in blackbody experiments and explain why these observations were in conflict with the predictions of classical physics. is this right? the shorter the wavelength, the greater the intensity. This is wht I wrote: Classical...

so is it rather t= d/c or t=dc?

ok so is it rather. t= d/c?

A rotating mirror with 16 sides was used to measure the tine it took light to travel 3.5km to a concave mirror and back. At what frequency did the rotating mirror need to turn to make 1/16th of a rotation in the time it took light to travel to 3.5km and back again? im having a bit of...