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Three long, parallel, straight wires pass through the vertices of an equilateral triangle that has sides L = 11.6 cm, as shown in the figure below. A a dot indicates that the direction of the current is out of the screen and a cross indicates that the direction of the current is into the screen.Each current is 14.0 A.(a) Find the magnetic field at the location of the upper wire due to the currents in the two lower wires in uT.Whats the direction(b) Find the force per unit length on the upper wire in N/m.Whats the direction
A softball of mass 0.220kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially at rest. Calculate the velocity of the target ball after the collision
A person holds a ladder horizontally at its center. Treating ladder as a uniform rod of length 3.30 m and mass 7.43 kg, find out the torque the person must exert on the ladder to give it an angular acceleration of 0.405 rad/s2.
The filament in an incandescent light bulb is made from tungsten. The light bulb is plugged into a 120 V outlet, determine how long must the wire be
Lightbulbs with the power ratings giving in the figure are connected in a circuit as shown. Find the power dissipated to each bulb
The beam from a diode laser is used to investigate the refraction of a piece of plastic. Determine the wavelength of the light in the plastic in nanometers (nm).
A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway, How much time is needed for the plane to clear the intersection
A 1792 kg safe is 3.01 m above a heavy-duty spring when the rope holding the safe breaks. What is the spring constant of the spring
A ball is thrown vertically upwards with an initial velocity of 21.84 m/s. Neglecting air resistance, how long is the ball in the air? What is the greatest height reached by the ball
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall. (a) What is the mirror's focal length? (b) How tall is the pencil's image if the pencil is move..
A fire hose ejects a stream of water at an angle of 35.8 ° above the horizontal. how far from a building should the fire hose be located to hit the highest possible fire
The length of a rectangualr piece of land is 100 ± 1 m and its width is 50 ± 1 m. What is the perimter of the land
A 768 kg car moving at 27 m/s brakes to a stop. The brakes contain about 16 kg of iron that absorb the energy. What is increase in temperature of the brakes
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