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A copper wire of radius a = 0.331 mm has an aluminum jacket of outer radius b = 0.459 mm. There is a currenti = 2.23 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8Ω·m and2.75 x 10-8Ω·m. Calculate the current (in A)in (a) the copper and (b) the aluminum. (c) If a potential difference V= 10.6 V between the ends maintains the current, what is the lengthin meters of the composite wire?
when the car you are riding in stops suddenly heavy objects move toward the front of the car. why does a helium-filled
Assume a ray of light is incident on an air / material boundary at 45 degrees to the normal. What is the critical angle for the material when it is surrounded by air
A spherical surface of radius R contains a charge Q in the center. What happens to the total flux of the electric field through the sphere if its radius increases by a factor of 10
question strontium sr with a mass number of 90 and an atomic number of 38 decays by beta emission. identify the product
The area of a typical eardrum is about 5.0 × 10?5 m2. Calculate the sound power incident on an eardrum at the threshold of pain
A cylinder with a ,ovable piston contains gas at a temp of 27degree C, a whole volume of 1.50 m cubed and an absolute pressureof 0.200 X 10 ^ 5 pa. What will be its final temp if the gas is compressed to 0.700 m cubed and the absoulte pressure increa..
A juggler throws a ball from height of 0.950 m with a vertical velocity of +3.75 m/s and misses it on the way down. What is its velocity when it hits the ground
One solenoid is centered inside another. The outer one has a length of 50.0 cm and contains 6750 coils, What is the mutual inductance of these solenoids
There are two identical, positively charged conducting spheres fixed in space. find the initial charge on each sphere
Linear polarizers whose transmission axes make an angle of 45degree with each other The transmitted light intensity through both polarizers is what percentage of the incident intensity?
You have just landed on a planet. You take out a block of mass 245g , release it from rest from a height of 14.01m, What is the acceleration of gravity on this planet
Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV. What is the stimulated emission wavelength
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