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1. A wire with a mass of 1.0 g/cm is placed on a horizontal surface with a coefficient of friction 0.20. The wire carries a current of 1.5 A toward the east, and moves horizontally to the north. What are the magnitude and the direction of the smallest magnetic field that enables the wire to move in this fashion?
2. The two parallel wires are perpendicular to the page and carry currents of 3.0 A and 5.0 A into the page.
Calculate the magnitude and direction of the magnetic field:
At a point midway between the wires.
At a point 20 cm above the wire carrying the 5.0 A current.
Calculate the heat flow through a 0.500m long copper bar with a cross sectional area of 0.50 cm2. One end at 3.0 degrees Celsius and the other end at 100.0 degrees Celsius
A block of mass m sits on a horizontal frictionless tabletop. It is connected by a light rope that passes over a light frictionless pully to a block of mass 5 kg that is suspended from the end of the rope. What is the mass m of the block on the tab..
A 0.48 m long guitar string, of cross-sectional area 1.0 10-6 m2, has Young's modulus Y = 1.90 109 N/m2. By how much must you stretch the string to obtain a tension of 30 N
a 2.0-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. the elastic
Superheated water vapor initially at 15 bar and 440°C is cooled at constant pressure to a saturated vapor state and is then cooled at constant volume to a final temperature of 120°C, Determine the quality of the water at the final state
An uncharged capacitor and a resistor are connected in series to a source of emf. If emf = 6.00 V, C = 21.0 µF, and R = 100 ?, evaluate the maximum charge on the capacitor
Tendons are strong elastic fibers that attach muscles to bones. To a reasonable approximation, they obey Hooke's law. How much energy is stored in it at that point
The driver of a car wishes to pass a truck that is traveling at a constant speed of 19.3 m/s . Initially, the car is also traveling at a speed 19.3m/s, How much time is required for the car to pass the truck
A cylindrical flask is fitted with an airtight piston that is free to slide up and down, as shown in the figure below. A mass rests on top of the piston. The initial temperature of the system is 313 K and the pressure of the gas is held constant at 1..
A circular coil with a radius of 20 cm and containing 60 turns is placed in a uniform magnetic field which makes an angle of 30 degrees with respect to the plane of the coil, find the magnitude and direction of the induced current in the coil
A model train moves along a horizontal circular track with a radius of 0.5 m. Starting from rest, What is the angular acceleration (in rad/s2) of the train
A boulder has a volume of 1 m3 and a mass of 5000 kg. what will be the effective mass of the boulder
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