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A horizontal wire of length 0.43 m, carrying a current of 6.9 A, is placed in a uniform external magnetic field. When the wire is horizontal, it experiences no magnetic force. When the wire is tilted upward at an angle of 22°, it experiences a magnetic force of 5.8 × 10-3 N. Determine the magnitude of the external magnetic field.
The pressure of a garden hose is 2 atmospheres. If the cross-sectional area of the hose is 4 cm^2 and the nozzle output area is .4cm^, How fast does the water leave the hose
Two wires of the same cross-sectional area and length, but made of different materials, are connected in series. what is the resistivity of the other material
A beam of light enters the fiber from air at an angle theta1 with respect to the normal. What is theta1 if light strikes the core-cladding interface at critical angle theta c.
Gas in a container is at a pressure of 1.5 atm and a volume of 4.0m3. What is the work done on the gas (a)if it expands at constant pressure to twice its initial volume? (b) if it is compressed at constant pressure to one-quarter its initial volum..
explain Which ball will hit the ground first.
A 25 g bullet strikes and becomes embedded in a 1.65 kg block of wood placed on a horizontal surface just in front of the gun, what was the muzzle speed of the bullet
Must show all work and calculations!!!! A primitive yo-yo is made by wrapping a string several times around a solid cylinder with m=200g and r=10cm. Find the tension in the string and the acceleration of the cylinder
A 13.5?F capacitor is connected to a power supply that keeps a constant potential difference of 26.0V across the plates. How much energy is stored in the capacitor before the dielectric is inserted
Calculate the magnetic field at the observation location. The space shuttle releases a satellite into the circular orbit 565 above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs.
To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. What was the raven's speed right after the collision
a hydraulic jack has an in[put piston area of 2 cm^2 and an output piston area of 18 cm^2. What will be the pressure on the oil
Find the charge-to-mass ratio of an unknown point charge that is repelled strongly enough from a single electron to be suspended motionless against its own weight
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