A coil is wrapped with 291 turns of wire on the perimeter of a square frame of sides 25.3 cm. Each turn has the same area, equal to that of the frame, and the total resistance of the coil is 2.05 Ohm. A uniform magnetic field is turned on perpendicular to the plane of the coil. If the field changes linearly from 0 to -0.0491 Wb/m2 in a time of 1.07 s, find the magnitude of the induced emf in the coil while the ?eld is changing. Answer in units of V

A canoe has a velocity of 0.470 m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510 m/s east relative to the earth. Find the direction of the velocity of the canoe relative to the river. Express your answer as an angle measured south of west.

An air conditioner draws 17 A at 220-V ac. The connecting cord is copper wire with a diameter of 1.291 mm .

a.) How much power does the air conditioner draw?

b.) If the length of the cord (containing two wires) is 6.5 m , how much power is dissipated in the wiring?

c.) If no. 12 wire, with a diameter of 2.053 mm, was used instead, how much power would be dissipated?

d.) Assuming that the air conditioner is run 13 h per day, how much money per month (30 days) would be saved by using no. 12 wire? Assume that the cost of electricity is 12 cents per kWh.

I have a question about difference between physical observables and eigenstates in quantum mechanics

it is postulated in Quantum Mechanics that

physical observable in Classical Mechanics are represented by linear operators

the state of the particle was represented by a curve in phase space determined by generalized position and momentum

but in Quantum Mechanics it is represented by a vector in Hilbert space

and if we measure the physical observable of the particle, the previous state of the particle once superpositioned with eigenstates of the physical observables

with the corresponding weighting factor(square of it is probability of yielding the result when measure) collapses to a single eigenstate and gives out the corresponding eigenvalue

but I don't understand what is the difference between physical observable represented by linear operator and the eigenstate of the particle

A point charge q1 = 4.25 nC is located on the x-axis at x = 2.20 m , and a second point charge q2 = -6.65 nC is on the y-axis at y = 1.30 m

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r1 = 0.460 m ?

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r2 = 1.70 m?

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r3 = 3.00 m?

A 1 048-kg satellite orbits the Earth at a constant altitude of 101-km.

(a) How much energy must be added to the system to move the satellite into a circular orbit with altitude 208 km?
MJ

(b) What is the change in the system's kinetic energy?
MJ

(c) What is the change in the system's potential energy?
MJ

An 70 kg running back has a football and is making a break for a touchdown at 9 m/s. On his way, a 126 kg linebacker running in the opposite direction at 4 m/s collides with him for the tackle. How much kinetic energy is lost in this collision?

Round intermediate answers to four significant figures and final answers to three significant figures for best accuracy.

Find the acceleration of a 2500 kg truck that has a force acted on by its wheels of 7kN. A force of friction of 1500 N is also acting on the truck.

Describe why capacitors and inductors give delay.

Why are dedicated PCC based care facilities such as Eden Homes, Green Houses and Wellspring Model Homes or comparable facilities limited in Canada? What is needed to allow for establishment of such facilities?

An electron is moving through a magnetic field whose magnitude is 8.70x 10^-4T. The electron experiences only a magnetic force and has an acceleration of magnitude 3.50 x 10^14m/s^2. At a certain instant, it has a speed of 6.80 X 10^6 m/s^2. Determine the angle (less than 90 degrees) between the electrons velocity and the magnetic field.

PLEASE TYPE THE ANSWER AND KEEP IT SHORT AND SIMPLE!!!! DO NOT COPY OTHER ANSWERS!

Contrast Newton's model of the universe with the descriptive models of Ptolemy, Copernicus, and Kepler.

How do you normalize the function psi= e^im(phi) between 0 and 2pi?

1) An electron passes through a point 3.15 cm from a long straight wire as it moves at 33.9% of the speed of light perpendicularly toward the wire. The wire carries a current of 18.9 A. Find the magnitude of the electron's acceleration at that point.

acceleration:____________ m/s2

2) A beam of protons is directed in a straight line along the positive ?‑direction through a region of space in which there are crossed electric and magnetic fields. If the electric field magnitude is ?=430 V/m in the negative ?‑direction and the protons move at a constant speed of ?=9.1×105 m/s, what must the direction and magnitude of the magnetic field be in order for the beam of protons to continue undeflected along its straight-line trajectory?

Select the direction of the magnetic field ?

a) positive y‑direction

b) negative ?‑direction

c) negative ?‑direction

d)positive ?‑direction

e) negative ?‑direction

f) positive ?‑direction

Magnitude of the magnetic field ? :________________T