Recent content by SciencePF

Suppose that the water in the black can goes to 50 ºC. Is it possible that the water in the white can goes to 50ºC, if we gave it enough time, maintaining same initial conditions?

Suppose the following experience: Two identical cans one black and one white with equal mass of water inside. We focus radiation at the same power on each. After enough time, that we want, do the water will reach the same temperature in both cans? If not, can we conclude that the water was at...

if when they are both on the Earth surface they read p.e. 12 oclock, and then one is put in orbit and after a certain period it came to Earth surface did they show the same number (time)?

Hello! What is the lifetime of a permanent magnet? How we calculate it? Thanks

Thx Doc Al :)

Why first photon emits two electrons in a photomultiplier tube? The interaction is one photon with one electron, am i right? Thanks in advance.

Hello :) Does an artificial satellite rotate in its own axis? tia

Did Rutherford knew the structure of alpha particles? If so, why was so important the scattering of alpha particles in the gold foil experiment? He knew the structure of helium atom! What is wrong with me? Thanks for your friendly collaboration and excuse me if the post makes no sense.

Hello, friends! I've google about the question below but no success! The question is: Gps signals inside buildings are nonexistent or very weak, but mobile phone and am and fm radio signals are good, so the question is: why gps satellites and mobile phone comunications don't use emission...

Hi! The question is Suppose we are irradiating a sample of a low pressure gas and some of the radiation is absorbed. Some books say we will obtain a discontinuous spectrum! But if we are irradiating a sample of a low pressure gas we will have absorption and emission at the same time and the...

My initial question, ----------------------------------- Suppose that, on Earth, a mass is suspended on a vertical string and is executing an harmonic motion with Period: T Amplitude: A Angular frequency: \omega Now all the system is put in the Moon. What changes that system will have...

But, in this site, has a simulation, and things don't work as you said! http://www.walter-fendt.de/ph14e/springpendulum.htm"

And what goes to happen with the amplitude of motion? Equal on Earth and Moon?

Suppose that, on Earth, a mass is suspended on a vertical string and is executing an harmonic motion with Period: T Amplitude: A Angular frequency: \omega Now all the system is put in the Moon. What changes that system will have? Thanks for you help

Ok, redundancy, but ... why 4 and not 5 or 3 or ... XY? Thanks.