iheartdr.sambeckett

I have the Deluxe version of the Disneyland annual pass and I know that when the pass is blocked out on a particular day that you can get a regular single day ticket for $45 instead of the full-price. What I was wondering is, is there a way to still get a discounted ticket on a day where the pass isn't blocked out? A friend of mine is in town and I want to take her but I was trying to see if there was a way she wouldn't have to pay the full price. Thanks!

Zinc has a photoelectric work funcion of Wzn= 4.33 eV.

Wavelength= 280nm.

What is the maximum kinetic energy?

I've tried doing this but its just not turning out right, what am i doing wrong?

f=c/wavelength=3.00x10^8/280=1.07x10^15

Kmax=hf-Wzn

Kmax=(6.63x10^-34)(1.07x10^15)-4.33 eV= -4.33 eV

I just keep getting the wrong answer and don't get it. Any help will be appreciated, thanks!

A laser beam emits photons with a wavelength of 512nm.

If such a laser emits 1.55×1019 photons per second, what is its power output in watts?

Any help would be appreciated! I have no idea how to approach this problem and I've been trying to work on it for days! Thanks!

Okay I've been staring at this problem for hours and I'm just extremely confused and any help would be appreciated.

Question:

A single-turn square loop of side is centered on the axis of a long solenoid. In addition, the plane of the square loop is perpendicular to the axis of the solenoid. The solenoid has 1240 turns per meter and a diameter of 6.50 , and carries a current of 2.90.

Find the magnetic flux through the loop when L=2.10cm. The answer for the magnetic flux is supposed to include the variable L.

I know that flux equals the magnetic field times the area.

B=(4pi*10^-7)(n)(current)

How do I go about solving for A?

I'm not sure if thats the equation for B I should be using but any help would be great. Thanks!

A long, thin wire is in a region of constant magnetic field . The wire carries a current of 6.2 and is oriented at an angle of 7.5 to the direction of the magnetic field. If the magnetic force exerted on this wire per meter is 3.3×10−2 , what is the magnitude of the magnetic field?

How do I go about solving this if I don't have a value for length? And the answer is supposed to be in mT.

Thanks!

Okay I've read over this over and over and I just can't seem to get this problem. I'd really appreciate it if someone could help me out.

The circuit in the figure includes a battery with a finite interal resistance, r= 0.55A.

Figure:

http://s262.photobucket.com/albums/ii106/iheartdrs...

A) Find the current flowing through the 7.1- resistor.

B) Find the current flowing through the 3.2- resistor.

Thanks a bunch!

Just to make sure I have the right answer. When doing a simple distillation, the reason why the liquid in the distillation flask doesn't evaporate all at once once the boiling point is reached is: the liquid distillated is separated from the volatile liquid still in the conical vile. You are purifying the liquid so not all the substance can be vaporized all at once.

I have an exam tomorrow, if I'm given different bases how am I supposed to tell which one is the strongest?

For example, between: HF, H20, NH3

In a classroom demonstration, the pressure inside a can is suddenly reduced to essentially zero. Assuming the can to be a cylinder with a height of 13 cm and a diameter of 43 cm, find the net inward force exerted on the vertical sides of the can due to atmospheric pressure.

The Surface Area of the cylinder is: 2pie(r^2)+2pie(r)(h).

The astmospheric pressure is: 1.01E5 Pa.

Should I just be using the P=F/A, P(A)=F?

A 51-kg person sits on a 3.5-kg chair. Each leg of the chair makes contact with the floor in a circle that is 2.1 cm in diameter. Find the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.

I know Pressure=Force/Area and that Area of a circle is pie(r^2). I just don't understand how to find out the force, and I know F=W=mg.

Help please? Thanks so much!

Here's the problem:

A large pendulum with a 200-lb gold-plated bob 12 inches in diameter is on display in the lobby of the United Nations building. The pendulum has a length of 80 feet. It is used to show the rotation of the Earth. What is the least amount of time it takes for the bob to swing from a position of maximum displacement to the equilibrium position of the pendulum?

[Assume the acceleration of the gravity is g=9.81 m/s^2 at the UN building]

I have no idea where to start with this, help will be appreciated! Thanks! :)