Recent content by johnknee

Homework Statement Hi I am doing an assignment and this question is actually really simple in a way, but I am not sure where I am getting this wrong. Which of the following statements about diffusion is false? Choose All That Apply Diffusion depends on the intrinsic kinetic energy of...

For part e) I got that formula from the textbook from the generator section. It said that max emf = NBA(angular velocity). I am not quite sure if I would apply that equation here in this specific question.

part e) What would be the maximum emf created if one were to create a simple generator with this smaller loop and spin it about an axis along the diameter at a rate of 65.0 rev/s in the given magnetic field? For this part, am I using the right approach? Max induced voltage = N*B*A*Angular...

Edit for d) Would induced emf be 0 because since the loop is rotated 90 degrees, the normal now lies perpendicular to the direction of magnetic field. Flux would be 0 when angle is 90 degrees so emf = 0?

Homework Statement A circular single loop of wire with a diameter of 20.0 cm lies in the plane of the paper in a region of space that contains a 1.75 T magnetic field pointing out of the paper. a) Determine the magnetic flux through this loop. b) If the diameter of the loop changes from 20.0...

anyone know how I would do part d.

Homework Statement Q. With the switch closed, what is the voltage difference, VA-VB ? Homework Equations Junction rule: I3 = I1 + I2 Loop rule(s) The Attempt at a Solution I solved for the currents in this circuit when the switch is closed. Top loop(clockwise): +10V1 - 15*I1 - 47*I1 +...

Homework Statement a) With the switch open, what is the current I1 ? (A positive sign means that current flows in the direction of the arrow.) b) Once the switch is closed in the circuit, what is the power dissipated in the 47 Ω resistor? c) How much current passes through the closed switch...

Sorry, not too sure what you mean. I included 18*I2 for the first loop. Is that not the current going through resistor in the middle?

Yes haha I dropped the first equation basically since I3 wasnt needed. I1 i drew to point towards the left from the top loop. As for I2, I drew it pointing towards the right on the middle segment. I3 I drew it point towards the right from the battery on the bottom loop.

Homework Statement Determine the magnitudes of the currents through R1 and R2 in (Figure 1) , assuming that each battery has an internal resistance r = 1.2 Ω . Express your answers using two significant figures separated by commas. Homework Equations Junction rule: I3 = I1 + I2 (any current...

Yeah I have many decimal points haha, it's just that the answer given by masteringphysics is in 1 sig fig.

For part A, I used the equation E = charge density/Permittivity of free space = 10^-5/(8.85*10^-12) = 1*10^6 N/C

Homework Statement A cell membrane consists of an inner and outer wall separated by a distance of approximately 10 nm. Assume that the walls act like a parallel plate capacitor, each with a charge density of 10^−5C/m^2, and the outer wall is positively charged. Although unrealistic, assume that...

Hi I am john, a current first year student attending university.