Recent content by NAkid

Homework Statement How do you find the phase angle of a wave equation given in the form y(x,t) = Acos(kx - wt) thanks Homework Equations The Attempt at a Solution

Homework Statement The wavelength of a particular ultraviolet radiation from hydrogen atoms is 1.216 e-7 m. Calculate the wavelength when the corresponding radiation from hydrogen in a distant galaxy is observed here on earth. The galaxy is receding at a speed of 0.11 c. Homework...

never mind i got it, thanks

ok, got that wavelength wave sped and period. what is the difference between wave speed and max transverse speed? also, I'm sure this is really obvious but i can't figure out the amplitude either

[SOLVED] mechanical waves Homework Statement A sinusoidal transverse wave is traveling along a string in the negative direction of an x-axis. The figure shows a plot of the displacement as a function of position at time t=0; the y-intercept is 4.0m. The string tension is 6.8N, and its linear...

Homework Statement A mass M is suspended from a spring and oscillates with a period of 0.820s. Each complete oscillation results in an amplitude reduction of a factor of 0.985 due to a small velocity dependent frictional effect. Calculate the time it takes for the total energy of the...

Homework Statement A metal plate in the shape shown has a mass of 2.00kg and hangs from a pivot point located a distance d=0.300m from its center of mass. Its moment of inertia, I_cm, about an axis perpendicular to the plate and passing through the CM is 0.210kg*m2. Calculate the magnitude...

the total force on star A would be G(mass starB) / (R)^2 + G(mass starC) / (2R)^2 ?

i think its supposed to be 10^24 and 10^30

Homework Statement The path of a very small satellite S in an elliptical orbit around a massive spherical planet P is shown in the figure. The distance from 3 to 4 is the same as from 4 to 5, 9 to 10, and 10 to 11. (Select T-True, F-False, G-Greater than, L-Less than, E-Equal to, If the first...

i'm still confused, the force is the total force due to the other two stars - what does that mean? and how does gravitational force work into this equation?

but their orbital radius is the same though?

ok so the force of gravity is Fg = (GM1M2)/R^2 If total force is what you have above, should I set that equal to 2*(GM1M2)/R^2 -- or the sum of Fg of star1 on central star and star 2 on central star?

isn't that basically what i did? calculated the changes to solve for velocity?

Homework Statement Two particles of masses M1 = 81000 kg and M2 = 9400 kg are initially at rest an infinite distance apart. As a result of the gravitational force the two masses move towards each other. Calculate the speed of mass M1 and mass M2 when their separation distance is 26.5 km...