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What current is needed in the windings of a long solenoid that has 850 turns uniformly distributed over a length of 0.410 m to produce at the center of the solenoida magnetic field of magnitude 1.00 x 10-4 T?
A thin homogeneous plate has the shape of an equilateral triangle and is suspended from one apex, acting as a physical pendulum. Use the Lagrangian to obtain the equation of motion and find the frequency of small oscillations, assuming the motion tak..
The hail comes straight down at a mass rate of m/?t=0.069 kg/s and an initial velocity of v0= -15 m/s. calculate the magnitude of the force exerted by the hail on the roof
A missile of mass 1.20 102 kg is fired from a plane of mass 4.85 103 kg initially moving at a speed of 3.35 102 m/s. what is the final velocity of the plane?
A cosmic ray electron moves at 7.85 x 10e6 m/s perpendicular to the earth's magnetic field at an altitude, What is the radius of the circular path the electron follows
At the instant a ball rolls off a rooftop it has a horizontal velocity component +12.0m/s of and a vertical component (downward) of 10.0m/s, What is the ball's speed as it leaves the roof
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the power supplied by the person pulling the bar
A rubber ball filled with air has a diameter of 25.0 cm and a massof 0.540 kg. What force is required to hold the ball
Select all that apply. Which is the following statements is true?
A microphone is located on the line connecting two speakers that are 0.514 m apart and oscillating 180° out of phase. What is the next highest frequency that produces an interference maximum at the microphone's location
A 0.1 kg block is attached to a spring with a constant 2.5 N/m and oscillates on a frictionless table. Its velocity is 0.2m/s when x=0.05. What is the amplitude of oscillations? What is the ball's maximum acceleration?
A 224-? and a 211-? resistor are connected in series across an unspecified power supply. what is the exact current (in A) through the 211-? resistor
An electron starts from rest 36.5cm from a fixed point charge with Q = -0.105?C. How fast will the electron be moving when it is very far away
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