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A rectangular aluminum bar with a cross-section of (0.02 x 0.08) m^2 and length 1 m carries a current of 100A. The conductivity of aluminum is 3.54 x 10^7 S/m.
a. Determine the resistance of the bar along its length.
b. Determine the current density flowing along the length of the bar.
c. Determine the electric field within the bar.
d. Determine the electric potential difference between the two ends of the bar.
A 20.0-kg mass is supported by two strings. The left string is 2.00 m long and the right string is 5.00 m long. What is the tension in the left side string
You and a friend have been given the task of designing a display for the Physics building that will demonstrate the strength of the electric force, calculate the necessary amount of charge on the marble for a reasonable ramp angle of 15 degrees
a sea divers suit has a thickness of 5 mm and is made of a material with thermal conductivitynbspof 0.05 wmk. if the
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.4 when the flywheel is rotating at 1.4×104 revolutions per minute. What is the moment of inertia of the flywheel
On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 deep in the trunk. what was the magnitude of its deceleration
Describe Erikson, Levinson, cognitive developmental theorists, Kohlberg, behavioral theorists, Bronfenbrenner, Holland, the eclectic theory, and composite theory.
The resistance of a conductor is 19.2 ohms at 1.50 degress C and 25.0 ohms 91.0 degress C. What is the temperature coefficient of the resistance
If a iron core of a collapsing star initially spins with a rotational frequency of fo=3.4 per second and the core radius decrease during the collapse by a factor of 24. what is the rotational frequency of the iron core at the end of collapse
A high-energy pulsed laser emits a 1.2-ns-longpulse of average power 1.3×1011W. Determine the rms value of the electric field
A car traveling at 93km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.75 m. What was average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00g ..
A particle, starting from point A in the drawing(the height at A is 3.00 m), is projected down the curved runway.Upon leaving the runway at point B, the particle is travelingstraight upward and reaches a height of 4.44 above the floor before falli..
A 5.0 kg hanging weight is connected by a string over a pulley to a 9.0kg block sliding on a flat table. If the coefficient of sliding friction is 0.20; what is the rate of acceleration of the system?
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