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A horizontal wire is hung from the ceiling of a room by two massless strings. The wire has a length of 0.21 m and a mass of 0.005 kg. A uniform magnetic field of magnitude 0.070 T is directed from the ceiling to the floor. When a current of I = 39 A exists in the wire, the wire swings upward and, at equilibrium, makes an angle f with respect to the vertical, as the drawing shows. Find (a) the angle and (b) the tension in each of the two strings.
A projectile is fired from ground at an angle 60 degrees above horizontal to hit a target on the wall, which is 25.0 m away. Find the initial speed of the projectile
The D string of a violin is a little too tightly stretched. Seven beats per second are heard when the string is sounded together with a tuning fork that is oscillating accurately at 293.66 Hz
A vacuum cleaner is plugged into a 120.0-V socket and uses 4.1 A of current in normal operation, Find the coil resistance of the motor
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -89\mu C. How many excess electrons does she get
Write down the equation for a transverse sinusoidal wave with an amplitude of 2.5 cm and an angular frequency of 2.90 rad/s that is moving along the positive x-direction with a wave speed that is 5 times as fast as the maximum speed of a point on ..
plan a vector to represent each of the two teams. find the magnitude of the resultant.
The largest and smallest slits in these experiments are 0.16mm and 0.04mm wide, respectively. How many wavelengths wide are these slits
A 21.5 g bullet strikes a 0.650 kg block attached to a fixed horizontal spring whose spring stiffness constant is 7.30 x 10^3 N/m and sets it into vibration with an amplitude of 21.5 cm. What was the speed of bullet before impact if the bullet and bl..
A person pushes the shopping cart with a force of 100 N acting down at 45 degrees. Of the cart travelled at a constant speed of 1.00 meters per second what is the value of combined retarding force acting horizontally on the cart due to friction an..
This question requires four answers. A15 Ω resistor, a 0.30 μF capacitor and a16.0 mH inductor are in a series, What is the rms voltage across the inductor
A very light rigid rod with a length of 1.32 m extends straight out from one end of a meter stick. The other end of the rod serves as a pivot and the system is set into oscillation
A scaffold of mass 44 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
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