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A length of aluminum wire has a resistance of 12.0 Ω at 22.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 28.2 Ω.
(a) Ignore thermal expansion; evaluate the temperature of the oven.
A long straight wire carries a current of 40 A in a region where a uniform external magnetic field has a 30-µT magnitude and is parallel to the current
a tennis ball bouncing on a hard surface compresses and then rebounds. the details of the rebound are specified in
a 1.0m--tall vertical tube is filled with 20c water. a tuning fork vibrating at 575hz is held just over the top of the
What is the magnitude of the electric force on an electron in a uniform electric field of strength 1510N/C that points due east
A model car is propelled by a cylinder of carbon dioxide gas. The cylinder emits gas at a speed of 4.5 g/s with an exit speed of 80.0 m/s. The car has a mass of 400 g, including the CO2 cylinder. Starting from rest, what is the car's initial accel..
The generator at a power plant produces AC at 24000 V. A transformer steps this up to 345,000 V for transmission over power lines. how many turns must there be in the output coil
A circular coil enclosing an area of 180 cm2 is made of 210 turns of copper wire. The wire making up the coil has resistance of 9.0 ?, what is the average current in the coil during that time
A rock is thrown vertically upward from ground level. 1.2 s later it reaches its maximum height and 1.8 s later, what is the height of the tower
An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. Find the maximum velocity (in meters/second) of the moving electron after release
A spherical steel ball bearing has a diameter of 2.540 cm at 26.00°C. (Assume the coefficient of linear expansion of the steel is 1.10 10-5(°C?1), and the average volume expansion coefficient is 3.30 10-5(°C?1).)
A pipe open at both ends has a fundamental frequency of 120 Hz. what is the fundamental frequency of this pipe
A child is twirling a 0.0165-kg ball on a string in a horizontalcircle whose radius is 0.130 m. The ball travels once around the circle in 0.649 s. (a) Determine the centripetal force acting on the ball. (b) If the speed is doubled, by what factor..
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