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]...
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...