Recent content by mike115

I am interested in being a physicist, but I want to know what kinds of careers most theoretical physicists pursue. If I want the opportunity to do research and further advance our knowledge and understanding of physics, should I pursue a career in academia? Would I get a chance to do that...

wave speed = wavelength*frequency

In part c, to calculate the period of oscillation and the maximum speed of the rod, would the effective spring constant be 2k (mg/d) since the two springs are in parallel?

Homework Statement Two long, straight wires cross each other at right angles, as shown in Figure P19.49. (a) Find the direction and magnitude of the magnetic field at point P, which is in the same plane as the two wires. (b) Find the magnetic field at a point 30.0 cm above the point of...

Homework Statement 24. A person tries to balance vertically each of three long uniform cylinders with equal radii on the end of his finger: * A wood cylinder of mass m and length L with moment of inertia I * A bamboo cylinder of mass m and length 3L with moment of inertia 9I...

Hmm, are you sure that your units are consistent on both sides? The specific heat of water is approximately 4.18 J/(g*C) which is equal to 4,180 J/(kg*C). The temperature change that I get is about 0.105 degrees C.

The period of the system (since it obeys Hooke's law) is given by T = 2*pi*sqrt(m/k). You can use the given data to solve for k, the effective spring constant. When the performer is at rest, the net force on him must be zero. Therefore, the upward spring force, kx, must equal the gravitational...

if you want m to be 1.5 kg, then yes

Yes. The first m should be the mass of both blocks since they both fall through that distance.

Try conservation of energy The change in gravitational potential energy equals the heat gained by the water.

All right, thanks kamerling!

[SOLVED] Connecting a known and unknown battery Homework Statement An unmarked battery has an unknown internal resistance. If the battery is connected to a fresh 5.60 V battery (negligible internal resistance) positive to positive and negative to negative, the current through the circuit is...

Ah, I guess it is. Can you tell me if this explanation is correct? All the excess charge in the conductor must be located at the surface of the conductor. If we construct a Gaussian surface inside the shell, the net electric flux and the electric field are both zero since there is no net charge...

Homework Statement A circular ring of charge of radius b has a total charge q uniformly distributed around it. The magnitude of the electric field at the center of the ring is: [Answer: 0] Homework Equations The Attempt at a Solution From the problem, do you just assume that the...

Hmm, can you please explain how that equation for transverse particle speed also applies to longitudinal waves like sound?