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Stainless-steel poles were arranged by an artist for the purpose of producing an enhanced display of lightning in a field of nearly one square mile. The magnetic field in New Mexico, where the rods are located, dips 64.0° below the horizontal and has a horizontal component of magnitude 2.5 10-5 T. Calculate the magnetic force on one of these poles, 6.09 m long, when it transmits an upward current of 2.16 x 104 A during a lightning discharge.
In 1980, over San Francisco Bay, a large yo-yo was released from a crane. Suppose the yo-yo was 135 kg, What was the tension in the cord on which it rolled
A 4.60 kg block of ice at 0°C is added to an insulated container partially filled with 11.6 kg of water at 15.0°C. Find the mass of the ice that was melted
The magnetic field of an electromagnetic wave in a vacuum is Bz = ( 3.5 muT) sin ( 1.6×10^7 x - 2pi f t) , What is the wave's electric field amplitude
A camera lens usually consists of a combination of two or more lenses to produce a good-quality image. How far to the right of the convex lens is the final image
Two blocks of mass m1 = 8.0 kg and m3 = 6.5 kg, connected by a rod of mass m2 = 1.5 kg, are sitting on a very low-friction surface, find the acceleration of the system of blocks plus rod
An experiment finds that standing waves on a 0.800-m-long string, fixed at both ends, occur at 24.0 Hz and 32.0 HZ, but at no frequencies in between. What is the wave speed on the string
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 variable inductor with negligible resistance is connected to an ac voltage source. By what factor does the current in the inductor decrease if the inductance is increased by a factor of 4.2 and the driving frequency is increased by a factor of 2.3?
A thermodynamic system undergoes a process in which its internal energy decreases by 455 J. Find the energy transferred from it by heat
What happens to support force on the workmens feet
A viewing window in the Atlanta aquarium is 67 inches wide and 43 inches high. what is the outward force on the window
As the drawing illustrates, two disks with masses m1 and m2 are moving horizontally to the right at a speed of v0. They are on an air-hockey table, find the velocity of disk 2 at that moment
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