Recent content by Ginerva123

[SOLVED] Gas laws Homework Statement A balloon containing 2000m^3 of helium gas at 1.00atm and a temperature of 15.0 C rises from ground level to an altitude at which the atmospheric pressure is only 0.900atm. Assume the helium behaves like an ideal gas and the balloon's ascent is too rapid...

Theta = sin-1(n lambda / d)... but without values for lambda or d (my 400 - 700 nm are only approximations for the second part) how would I solve this? (My profuse apologies if I'm coming across as particularly obtuse here, but I just can't grasp this question!)

I'm sorry, but there just seems to be to many unknowns in the question for me... using a small angle approximation won't eliminate any of them, as far as I can see. Is there perhaps another equation I could use to find d?

[SOLVED] Diffraction Grating Homework Statement Find the number of slits per centimeter of a grating designed to disperse the first-order visible spectrum through an angular range of 15.0. Find also the angles at which the first-order visible spectrum begins and ends. Homework...

[SOLVED] Momentum - collision Homework Statement An object of mass 950kg traveling east collides with an object of mass 1900kg traveling north. The two objects then move off together at 16m/s in a direction of 24degrees east of north. Find their respective velocities prior to the collision...

You know that the 3kg is due north and the 12kg is to the east of the origin. Therefore, you know that the third mass must be placed south-west of the origin to mantain equilibrium. Bear in mind that this is the y=x line.

distance= square root of [(x2-x1)^2 + (y2-y1)^2]

Have you tried finding the distance between the points and the origin?

y(x,t)=(Asinkx)sinwt I thought the second derivative wrt x was equal to the second derivative wrt t by the inverse of v squared. Or maybe not.

Differentiate with respect to t, using the chain rule.

Are you familiar with the equation of a standing wave? If you are, then you can differentiate it once and equate it to your maximum velocity, and then equate your maximum acceleration to the second derivative of the standing wave equation. You can then find A and w.

Homework Statement Adjacent antinodes of a standing wave on a string are a distance 15.0cm apart. A particle at an antinode oscillates in simple harmonic motion with amplitude 0.850cm and period 0.0750s. The string lies along the +x - axis and is fixed at x=0. At time t=0, all points on the...

Homework Statement The acceleration of a bus is given by , a(t) = xa where x = 1.24 m/s3 is a constant. If the bus's velocity at time t1 = 1.15s is 4.94 m/s, what is its velocity at time t2 = 2.10s ? Homework Equations I know I have to integrate somehow, but the only equation I can...