Recent content by uestions

Are my thoughts correct? **Wave function just means the wave function psi. I will specify when the wave function is squared. 1.) Schrodinger's Equation describes particles-their position, energy, spin (through the "numbers" l, n, and m). 2.) Simplified, SE says the total energy is the sum of...

Homework Statement Consider an investment of $5,000 at 6% convertible semiannually. How much can be withdrawn each half−year to use up the fund exactly at the end of 20 years? Homework Equations the present value annuity-immediate equation equation of value relating 5000 to the...

Homework Statement How much work is done by the spring on the object as it stretches 0.02m? The spring has a k value of 270N/m and the object is 0.55 kg. Homework Equations Ui = Uf - Ws Ws = 0.5kxf2 - 0.5kxi2 The Attempt at a Solution Assuming Ui is when the spring isn't...

How can work be done to an object that has a change in potential energy, but no change in velocity?

When does the Kinetic Work Energy Theorem not apply to a situation? Or better, is there a general form of the equation where work can equal the change in any energy? What is work besides a force and a distance?

Do you know what the difference is between the change in entropy and the standard change in entropy? Is it just the reaction conditions?

In the Gibbs free energy equation, does the standard change in entropy equal q(sys)/T(system)? Or in math terms: T(surr) * q(sys)/T(sys) = T(surr) * dS(standard) Thus dS(standard) = q(sys)/T(sys) (surr) = surroundings (sys) = systems (standard) = at standard conditions

Can a gas expand and lose temperature (because it did work on a piston while expanding)?

There is a container of a fixed volume filled with gas. There is a second container with a piston filled with gas. The containers are filled with the same amount of gas, have the same pressure, have the same volume (the piston is placed so the gases of each container occupy the same volume)...

Why must the net force be zero? If it weren't, would that mean one weight would have a different acceleration?

Why must the tension be equal for each weight? Because of Newton's Third Law? Does the tension take into account the other weight's (as in object) weight (as in force) pulling on another weight (object)?

Why does the magnitude of the tension not equal the magnitude of the difference in the weight of the weights?

Atwood's Machine, with one pulley and two weights, is analyzed with two free body diagrams. Each diagram depicts the forces applied to each weight. If the weights are connected, why isn't gravity considered to be pulling on both weights in the same direction? (Meaning, why aren't the masses for...

Homework Statement The new standard for arsenate in drinking water, mandated by the Safe Drinking Water Act, requires that by January 2006, public water supplies must contain no greater than 10 parts per billion (ppb) arsenic. Assuming that this arsenic is present as arsenate, AsO43-, what...

1 more question, what makes the program return to calls recursion0(3) and (4) when nothing explicitly says to return there?