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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?
A swimming pool 2.6 m by 1.0 m has a uniform depth of 2.0 m, What is the absolute pressure at the bottom of the pool
A 64.0-kg survivor of a cruise line disaster rests atop a block of Styrofoam insulation, using it as a raft. What total mass of survivors can the raft support
question a 60 year old person has a threshold of hearing of 75.0 db for a sound with frequency f 10000 hz. by what
A 8 g bullet has a speed of 180 m/s and embeds itself into a 500 g block. What is the speed of the block after the collision
A ferryboat transports tourists among three islands. It sails from the first island to the second island, 5.78 km away, Calculate the distance between the first and third islands
A pendulum of length 7.87 m is released from rest at an angle of 22.4 º from the vertical. What is the maximum speed of the pendulum
A plane goes from a velocity of 28 m/s to -45 m/s in 12 seconds. What is its average acceleration
Consider a gas of neutrons in a nuclear reactor. The neutron density is 10^8 neutrons/cm^3 in an operating reactor which has a core temperature of 535K. Are the neutrons in the reactor core a classical gas or a quantum mechanical gas and how ca n yo..
A 170g baseball is pitched at 30m/s spinning at 53rad/s . You can treat the baseball as a uniform solid sphere of radius 4.5cm. What fraction of its kinetic energy is rotational
a pendulum is made of a uniform stick of length l. it is allowed to swing in a vertical plane. where should the pivot
An inductor is connected to a 15kHz oscillator that produces an rms voltage of 7.0V. What is the value of the inductance L
The first-order principal maximum produced by a grating is located at an angle of ? = 17.3 degrees. What is the angle for the third-order maximum with the same light
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