Magnetism is produced by circulating electric currents, but also by the spin of elementary particles and many atoms that are small magnets. An electric current I circulating in a wire of radius R, produces a magnetic field in the center of the wire of value B = u or I /) 2r). (uo - 1.26 x 10 ^ -6 T m / A).

We can use this formula as a model for three situations: the Earth, an atom of iron and the electron.

a) For Earth, R = 6,000 km and B = 5 x 10 ^ -4 T. Estimate the order of the current that is capable of generating this field.

b) For the iron atom, the magnetic field is produced by the electron of the last level, which is a charge of 1.6 x 10 ^ -19 C which circulates with the frequency of 10 ^ 16 Hz, in a radius of about 10 ^ -10 m. Calculate the order of the magnetic fields in the iron atom.

c) For the electron, the 1.6 x 10 ^ -19 C charge that rotates on itself. Assume that the turning radius is the order of R = 10 ^ -18m. The current is then of the order of e v / (2piR) = e f, where f is the frequency of rotation. Using this formula, calculate the value of B generated by the electron.

A curve of radius 30 m is banked so that a 950 kg car travelling at
40 km/h can go round it even if the road is so icy that the coefficient of static friction is approximately zero. You are commissioned to tell the local police the range of speeds at which a car can travel around this curve without skidding. Neglect the effects of air drag and rolling friction. If the coefficient of static friction is 0.3, what is the range of speeds you tell them?

A photographer in a helicopter ascending vertically at a constant rate of 15.0m/s accidentally drops a camera out the window when the helicopter is 54.0m above the ground.

a)How long will the camera take to reach the ground?

b)What will its speed be when it hits?

Describe the lung cancer and how a CT scan has affected the diagnosis and/or treatment of this pathology over the years.

Comets travel around the sun in elliptical orbits with large eccentricities. If a comet has speed 1.8×10⁴ m/s when at a distance of 2.6×10¹¹ m from the center of the sun, what is its speed when at a distance of 5.2×10¹⁰ m

v=…..m/s

When a block is completely submerged under water, the buoyancy force on it is 11.8N; when it is completely submerged under an unknown liquid, the buoyancy force is measured to be 7.8N. What is the density (in unit of kg/m3) of the unknown liquid?

When an object is completely submerged under water (LaTeX: \rho_{water}=ρ w a t e r =1000kg/m3,), the buoyancy force on it is 6.2N. If the object is completely submerged under a different liquid (LaTeX: \rho_{liquid}=ρ l i q u i d =781kg/m3,) what would be the buoyancy force on it (in unit of newton)?

A coal-fired power plant uses 400 ◦C steam to turn a turbine. Afterwards, the steam is condensed at a temperature of 25 ◦C. If the plant burns 1 million kg of coal in one hour, running at maximum efficiency, what is the amount of work that could be done by the turbine in that hour? (Coal contains 27 kJ of energy per g).

1. A particle starts from rest, increasing its speed evenly, traveling a distance of 10.0 (m) in a time of 1.40 (s). From that moment it is kept at constant speed for 1.00 (s). Then its speed decreases to rest in a time of 2.80 (s). Calculate the total displacement of the particle.

STEP BY STEP PLEASE

Consider the asymmetric 1/2 harmonic oscillator. use the Variational Principle to estimate the ground state energy of this potential. Use as your trial function Axe^bx^2

What would the electric force of the Moon on the Earth be if the Moon had 10^52 electrons attracting an equal number of protons in the Earth? The Earth-Moon distance is 400,000km. Given the value you got (compare to gravity between the Earth & Moon), why do we ignore electrical forces at astronomical distances?

-What is the principle in this problem?

-Step by Step solution. Pictures help.

Instructions: Provide full solutions to the following problems:
A propeller consists of two blades, each 3.00 m in length and with a mass of 120 kg. The propeller can be modeled as a single rod rotating about its center of mass. The propeller starts from rest and rotates up to 1200 rpm in 30. s at a constant rate.
A)Find the angular momentum of the propeller at t = 10 s and t = 20 s.
B)Find the torque on the propeller.

The wavelengths in the hydrogen spectrum with m = 1 form a series of spectral lines called the Lyman series. Part A Calculate the wavelength of the first member of the Lyman series. Express your answer to three significant figures and include the appropriate units. λ1λ 1 = nothing nothing Request Answer Part B Calculate the wavelength of the second member of the Lyman series. Express your answer to three significant figures and include the appropriate units. λ2λ 2 = nothing nothing Request Answer Part C Calculate the wavelength of the third member of the Lyman series. Express your answer to three significant figures and include the appropriate units. λ3λ 3 = nothing nothing Request Answer Part D Calculate the wavelength of the fourth member of the Lyman series. Express your answer to three significant figures and include the appropriate units.

Please give me 2 examples of angular analoge of newton's 3rd law of motion on cricket and 2 examples of angular analoge of the 2nd law of motion on cricket sport and examples of co efficient of restitution, conservation of momentum and transfer of angular momentum on cricket please answer in the form of screenshots or videos

blue light lenses

You can write about a blue light lens

The only criteria is that the write up must touch on 3 areas:

1. What is the problem this product (or technique) can solve
2. What are its limitations
3. What are its competing products

This is basically an essay about an optical product that you either are familiar with, or research. No calculations, no maths, and no more than 2 pages.