Recent content by Bugsy23

Thanks, I've got it now

Homework Statement Aluminium atoms at 1173K enter a vacuum chamber. Calculate the most probable speed for the atoms. Homework Equations vmp=\sqrt{}(2kT/m) The Attempt at a Solution The molar mass of aluminium is 0.0270kg mol^-1, so vmp=\sqrt{}(2*1.381*10^-23JK^-1)*1173K/0.0270kg...

Homework Statement A sample of 8.02*10^-1 moles of nitrogen gas (\gamma=1.4) occupies a volume of 2*10^-2m^3 at pressure 1*10^5pa and temperature 300K. The gas is adiabatically compressed to half its original volume. What is the change in entropy of the gas? Homework Equations...

Homework Statement A flat round disc of mass 0.6kg is pushed across an icy surface. It has an initial velocity of 3.5ms^-1 and the coefficient of sliding friction is 0.02. Calculate the distance traveled before the disc eventually comes to a rest. Homework Equations The only one I can...

Homework Statement A flyball governor has an angular speed of 8.10 rad s^-1. Find the total energy supplied to the flyball governor in order for it to reach this angular speed Homework Equations Kinetic energy=rotational energy+translational energy translational energy=(1/2)m*v^2...

Is there more than one way to find the length of a pendulum undergoing lightly damped harmonic motion? The equation I have is l=(T/2pi)^2*g Is there an alternative equation for calculating length, which also takes into account the oscillator's mass?

Homework Statement Explain how the parabola that is the graph of f can be obtained from the graph of y=x2 Homework Equations f(x)=-1/3(x-2)2+3 The Attempt at a Solution a y-scaling with factor -1/3 a horizontal translation by 2 units to the right a vertical translation by 3...

Homework Statement I need to derive an expression for the moment of inertia of the two masses at the ends of the arms of a speed governor Homework Equations The Attempt at a Solution The equation for the moment of inertia of a system of particles rotating about a given axis is...

Homework Statement I need to calculate the total current a battery supplies in a steady state. The voltage supplied by the battery is 2.0V, and the total effective resistance of the circuit is 22kΩ Homework Equations i=V/R The Attempt at a Solution i=2/22000=9.09*10-5amps Is...

Why does the ideal gas state equation fail at high pressures for real gases? I think it has something to do with the forces between the molecules in the gas, but I'm not sure the exact reason

Sorry if someone already posted this link but did anyone see this in the news? http://www.nasa.gov/home/hqnews/2010/nov/HQ_10-295_FERMI.html What are people's opinions on what this might be?

So would this be right?: ax-bx=a2-b2 x(a-b)=a2-b2 x=(a2-b2)/(a-b)

Homework Statement I need to rearrange the following equation to find x in terms of a and b, assuming that a≠-b Homework Equations a(a+x)=b(b-x) The Attempt at a Solution So far I have multiplied out the brackets and came up with a^{}2+ax=b^{}2-bx but I don't really know...

Homework Statement I need to find the speed, at time t=0.015s, of a hydraulic valve component undergoing sinusoidal vibrations. The frequency of the vibrations is 25Hz, the amplitude is 2cm and the angular frequency is 157 s-1 Homework Equations The equation for speed of sinusoidal...

Homework Statement I need to calculate the frequency, angular frequency and period of sinusoidal vibrations in simple harmonic motion. The acceleration amplitude is 10g (98.1m s-2) and the vibration amplitude is 2cmHomework Equations The equation I have for frequency is f=(√(a/A))/2*pi where a...