Recent content by kariibex

Homework Statement Consider the following aqueous solution at 25°C Cr2(SO4)3, 1.26 mol/L, 1.37 mol/kg Calculate the mole fraction, density and % w/w Homework Equations χ = n Cr2(SO4)3 / n Cr2(SO4)3 + n H2O Unit conversions ρ= g solvent / mL solution % w/w = mass solvent / 100 g...

Oh! I'm sorry, I just realized my mistake (substituted the wrong value) :) Anyways, my new θ turns out to be: 98^2 = 525^2 + 558.4^2 - 2(525)(558.4)cosθ -577831.5 = -586320cosθ cosθ = 0.9855 θ = 9.8° Hopefully my method is correct? Thank you for all your help, I really appreciate...

Thank you for the reply. Okay, so using 60° + 45°, I calculated my new resultant vector as 558.4 km/hr. The only issue is when I solve for theta, cosθ = 1.138, which cannot be solved for. Is there something I'm missing?

Homework Statement A plane is steering N45°E with an airspeed of 525 km/h. The wind is from N60°W at 98 km/h. Find the ground speed and the direction of the plane. Homework Equations Cosine law, sine law, vector addition/subtraction. The Attempt at a Solution I have attached an...

Homework Statement If the gravitational acceleration at Earth's surface is given by: g = GMe/Re^2, show that the period of rotation of a spaceship needed to make an astronaut feel the same normal force on the ship that they would feel on Earth, when it is given by T = √[(4pi^2)(Rs)(Re^2)/GMe]...

Ahh! Thank you so much :)

I'm allowed to use substitution even though they're in different axis?

Homework Statement A comet of mass 6000 kg traveling at 30 000 m/s splits into two pieces that move apart with velocities that make equal angles of 20° relative to the original trajectory. If one piece is found to be 5 times the mass of the other...calculate the mass of each piece, find the...

Homework Statement A pipe resonates at successive frequencies of 540 Hz, 450 Hz, and 350Hz. Is this an open or a closed pipe? Homework Equations L = (nλ)/2 or L = ((2n-1)/4)λ v = fλThe Attempt at a Solution The difference between the first two frequencies (540 & 450) is 90Hz, and the...