Recent content by Xamfy19

Homework Statement An object of mass m=1.0kg experiences a force of the following mathematical form, F(t)=k*e^(-c*t) i where k=6.0N and c=0.10 (1/s) and i indicates the unit vector in the x-direction.At time t=0, the object has a velocity of v=2.0 m/s and is at the origin. Where is this...

Thanks, but how the payback rate is taken into account?

Hello, I need help for the following question: Peter borrowed $100,000 from bank and he pays back at a rate of $12,000 per year. The bank charges him interest at a rate of 7.25% per year compounded continuously. Make a continuous model of his situation using differential equation involving...

thanks, Daniel

Great, but what are the p^u, w and p? I guess w = w1 + w2 is the energy conservation p = p1 + p2 is the momentum conservation, and what is the first equation ? thanks

Thanks alot.

Here is the question I had trouble with it: How to prove that an isolated photon cannot split into two photons going in direction other than the original direction. I thought photon doesn't have mass, then energy = momentum. from momentum conservation law. If photon split into two...

Suppose that the fermium-252 nucleus could undergo a decay in which a (beta-) particle was produced. How would this affect the atomic number of the nucleus? Explain briefly. This looks pretty easy, but I think it's trying to trick you. Thank you for helping.

The amount of energy required to free electron is -13.6 ev, as you mentioned. This left 1.4 eV for kinetic energy. A total of 2.24 x E-19 J (1.4 x 1.6 E-19) is kinetic energy. v = 7.02 E5 m/v, That's what I got. Thanks alot

Hello, please help with the following question: the hydrogen atom is in ground state when a 15-eV photon interact with it and all the photon's energy is transferred to the electron,, freeing it from the atom. a) what is the energy of the ejected electron b) the de Brogle wavelength of the...

thanks alot, gentlemen!

Thanks alot

Hello All; Please help solve the following question: 12 people use a dining room with 3 tables. Each table can sit 4 person. How to arrnage the seatings in 5 days so that each person can share the table at dinner with each other person? thanks alot,,, :rolleyes:

dining table seating question 12 persons sitting in three dining table in five days. How to arange the seating so that they meet each other in five days? I got it. thanks alot.

Cool; a + 1/a = (a^2 + 1)/a >= 2 since (a-1)^2 >= 0