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A vertical straight wire carrying an upward 30-A current excerts an attractive force per unit length of 8.0*10^-4 N/m on a a second paralled wire 7.0 cm away. What current (magnitude) flows in the second wire?
When a current flows in an aluminum wire of diameter 3.29 mm, the drift speed of the conduction electrons is 2.85 × 10-4 m/s. What is the electron current in the wire
what is the magnitue of the magnetic field in the centre of a solenoid with a current of 1.25 A, Describe the right hand rule for solenoids
Two long parallel wires, each carrying a current of I = 4.0 A in the same direction, What is the magnitude of the Magnetic force per unit length between the wire
A ray of light is incident on a flat surface of a block of cubic zirconia that is surrounded by water. obtain the angle of reflection
The intensity of sunlight striking Earth's upper atmosphere (called the solar constant) is 1.35 kW/m2. Find the radiation pressure at the surface of the sun
An object weighting 100N is traveling vertically upward from the ground in the absence of air resistance at a constant velocity of 5 m/s
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
Two events in reference frame S occur 10?s apart at the same point in space. The distance between the two events is 2400 m in reference frame S?, What is the time interval between the events in reference frame S? ?
When winter arrives, the towers stay the similar distance apart and the bridge deck keeps the similar shape as its expansion joints open. When the temperature drops to -10.0°C, what is the tension in the wire? Take Young's modulus for steel to be ..
You are designing a precision mercury thermometer based on the thermal expansion of mercury, Determine the initial volume of mercury that allows this change, Find the radius of a spherical bulb that contains this volume of mercury
The top of the pool table is 0.850 m from the floor. The placement of the tape is such that 0 m is aligned with the edge of the table, calculate his break shot speed
A ladder of length L = 2.5 m and mass m = 15 kg rests on a floor with coefficient of static friction ?s = 0.57. Assume the wall is frictionless. What is the normal force the floor exerts on the ladder
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