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At a certain location, Earth's magnetic field of 53 µT is horizontal and directed due north. Suppose the net field is zero exactly 7.5 cm above a long, straight, horizontal wire that carries a constant current. What is (a) the magnitude of the current (in A) and (b) the angle between the current direction and due north?
An X-ray tube is similar to a cathode-ray tube. Electrons are accelerated to high speeds at one end of the tube. What speed would this potential difference give to protons
the position of a particle moving along the x axis is given in centimeters by x 9.13 1.33 t3 where t is in seconds.
A dampled harmonic oscillator is made from a 0.8kg mass on a k=14N/m spring with a damping constant of 400g/s, what is the initial energy of the oscillator
A helicopter, starting from rest,accelerates straight up from the roof of a hospital. The liftingforce does work in raising the helicopter. An 810-kg helicopterrises from rest to a speed of 7.0 m/s in a time of 3.5s. Duringthis time it climbs to a..
A speedboat moves on a lake with initial velocity vector V1x= 9.27m/s and V1y= -2.83m/s, What are the components of the speedboat's final velocity
If a car traveling at 55 km/h will skid 24 m while its brakes lock, how far will it skid if it is traveling at 130 km/h when its brakes lock.
In a defribrillator, which delivers the electric energy stored in the 175x10^-6F capacitor to restore the heart's regular beating, find the energy stored in the charged-up defribrillator
Calculate the rotational inertia of a meter stick, with mass 0.83 kg, about an axis perpendicular to the stick and located at the 44 cm mark
The tungsten filament of a light bulb has an operating temperature of about 2 100 K. what is the power output of the light bulb
A cylindrical fishing reel has a moment of inertia of I =7.3 10-4 kg·m2 and a radius of4.0 cm. What is the force of the fish on the line
A soccer ball is kicked with an initial horizontal velocity of 12.0 m/s and an initial vertical velocity of 19.0 m/s, How far from where it was kicked will the ball land
a certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. what is the highest frequency associated
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