Recent content by VincentweZu

I'd just like to thank you, you've cleared up so much!

Thanks it helps a lot. PΔV is equal to W. I guess ii) is wrong since numerically the value for W is +3600J not -3600J Thus the ΔU should be +5400J not -5400J That would effect the answer in iii) so the Q is +9000J. Sorry but I'd just like to clarify the last line. Do you mean that...

Homework Statement the diagram above of pressure P versus volume V shows the expansion of 2.0 moles of a monatomic ideal gas from state A to state B. As shown in the diagram PA = PB = 600 N/m2 , VA = 3.0 m3 and VB = 9.0 m3. a) i) Calculate the work done by the gas as it expands ii)...

Although using \frac{1}{2}k(Δx)2= \frac{1}{2}mv2 would get (1/2)A. I disagree that doing this is correct. In SHM the total energy of the system is \frac{1}{2}kA2 and the law of conservation of energy states that this is a constant. Therefore at any instant of the motion the sum of the kinetic...

Thank you for your response! Definitely there is no instant during oscillation where both these conditions occur, however, the equation which I have used - the conservation of energy, does not require that they do occur at the same time. In fact, all the law of conservation of energy states...

Thanks for your response! So what I have to do is to start with a = \frac{dv}{dx}\frac{dx}{dt} a = \frac{dv}{dx}v Since a = x x = \frac{dv}{dx}v ∫(x)dx = ∫(v)dv x2/2 = v2/2 + c where c = 8 Am I on the right track?

Homework Statement A mass m is attached to a horizontal spring of spring constant k. The spring oscillates in simple harmonic motion with amplitude A. Answer the following in terms of A. At what displacement from equilibrium is the speed half of the maximum value? Homework Equations PE1 +...

Homework Statement If the acceleration of a particle on a horizontal line is x where x represents the position in centimetres from the starting position of zero and if the initial velocity is 8 centimetres per second find the velocity of the particle when it is in a position of 15...

No because Hydrogen bonding is a form of intermolecular force - forces which occur between molecules. The bonding of hydrogen and oxygen in water is an example of intramolecular force - the force within a molecule.

Homework Statement A hiker, who weighs 985 N is strolling through the woods and crosses a small horizontal bridge. the bridge is uniform, weighs 3610 N, and rests on two concrete supports, one at each end. he stops one - fifth of the way along the bridge. What is the magnitude of the force...

I never caught that mistake haha! Thank you very much! Thanks everyone for helping out! It has been appreciated.

Homework Statement A Kennedy half-dollar has a mass that is 1.150 x 10-2 kg. The coin is a mixture of silver and copper, and in water weighs 0.1011 N. Determine the mass of silver in the coin. Homework Equations Explicit givens: m = 1.150 x 10-2kg apparent weight =...

In projectile motion: the horizontal component is assumed to have no acceleration and thus the velocity is constant. the vertical component is assumed to have only the acceleration due to gravity acting on it and thus you can use the equation vy2 = vy1 + 2at since acceleration due to gravity...