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You are holding a compass 3.50m from a long straight electrical supply wire that is carrying a direct current perpendicularly to the local direction of the Earth's magnetic field. Instead of orienting to any consistent "north" direction, the compass needle swings aimlessly no matter how you tilt or shake the instrument. The strength of the Earth's magnetic field at your location is 5.12E-5 T. What is the magnitude of the current carried by the wire?
water flows with soeed1 m/s from a small hole made at the bottom of a tank filled with water. find height of the tank
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. determine the final sound wave amplitudes
A 200 g block is pressed against a spring of force constant 1.40 kN/m until the block compresses the spring 10 cm. The spring rests at the bottom of a ramp inclined at 60.0 degrees to the horizontal.
Compute the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.10 m above the ground.
A ball is thrown upward from the ground with an initial speed of 15.2 m/s; at the same instant, After how long will the balls be at the same height
A spring has an unstretched length of 12cm. When an 80 g ball is hung from it, the length increases by 4.0 cm. What is the period of the oscillation
A force vector has a magnitude of 595 newtons and points at an angle 39o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
The floor received most of the collision energy and the force of the ball on the floor is upwards.
Consider a tungsten filament in a light bulb. After the bulb has been on for an hour, how has the resistance in filament changed (if at all).
In a single slit diffraction experiment, a beam of monochromatic light of wavelength 640 nm is incident on a slit of width 0.400 mm. what are the positions of the first dark fringes
The rotor in a certain electric motor is a flat, rectangular coil with 85 turns of wire and dimensions 2.25 cm by 4.36 cm. The rotor rotates in a uniform magnetic field of 0.800 T. What is the average power of the motor
A rectangle has an area of 33.66 cm2. When both the length and width of the rectangle are increased by 1.30 cm, find the length of the shorter of the two sides of the initial rectangle
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