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A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 69 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic
North American electrical outlet (ΔVrms = 120 V, f = 60.0 Hz). Assuming the energy stored in the capacitor is zero at t = 0, determine the magnitude of the current in the wires at t= 1/179s.
A massive steel cable drags a 21.0 block across a horizontal, frictionless surface. A 90.0 force applied to the cable causes the block to reach a speed of 4.10 in 1.70. What is the difference in te
The five masses below all have the same radius and a cylindrically symmetric mass distribution. They start to roll down an inclined plane, starting from rest, at the same time and from the same heig
A vertical electric field of magnitude 3.00 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. A car with a rectangular size of 6.00 m by 3.00 m is traveling along a
Joe has a weight of 1046 N while standing on the surface of the earth.What would his weight (the gravitational force due to earth) be if his distance doubled from the center of the earth by flying
First-order bright bands appear 3.65 cm from the central bright band. The screen is 1.20 m from the slits. How far apart are the slits?
While doing so it travels 117m in the +x direction and ends up with a velocity of +6.7m/s. What was the cars initial velocity?
Two adjacent natural frequencies of an organ pipe are found to be 390 Hz and 450 Hz. (a) Calculate the fundamental frequency and length of this pipe.
A radio station broadcasts at a frequency of 600,000 Hz. Knowing that radio waves have a speed of 3.00 x 10^8m/s, what is the wavelength of these waves?
Runner A is initially 5.4 km west of a flagpole and is running with a constant velocity of 2.6 km/h due east. Runner B is initially 3.0 km east of the flagpole and is running with a constant veloci
The suspended mass remains in equilibrium while the puck revolves on the surface. What is the magnitude of the force that maintains circular motion acting on the puck?
A 25.0 gram arrow is shot through a 7.8 cm apple. If the arrow enters the apple at 38.8 m/s and emerges with a speed of 30.1 m/s in the same direction, what is the magnitude of the force with which
Which configuration "consumes" more power, series or parallel? (b) By what factor must you multiply the power consumed by the low-power configuration to get the power consumed by the higher-power c
Two tones of frequency f_1 and f_2 are played simultaneously. The superposition (sum) of the two tones results in a new tone of frequency of f = 504 Hz with an amplitude that varies with a frequenc
Their cross-sectional areas are 1.00, 5.00 and 10.0 cm^2. (a) What is the potential difference across the narrowest wire? (b) The medium wire? (c) The widest wire?
How long would it take you to cover the 83 length of the walkway if, once you get on the walkway, you immediately turn around and start walking in the opposite direction with a speed of 1.6 relativ
Potential difference across the capacitor to be 9.0 V. What capacitance should be placed in series with this capacitor to obtain the desired potential difference across it?
A 1600-kg submarine rises straight up towards the surface. Seawater exerts both an upward buoyant force of 16450 N on the sub, as well as a downward resistive force of 1000 N. What is the submarine
The total momentum of a closed system is observed to be 640 kg·m/s east. The system consists of 36 objects that are observed to be colliding with each other. After 13.3 min and 4722 collisions, wha
A flight attendant pulls her 70.0 N flight bag a distance of 257 m along a level airport floor at a constant speed. Find the work she does on the flight bag.
What is the source of pressure in the core of a red giant that resists the force of gravity
If the plates of the capacitor are then moved closer together (the separation distance d between the plates is halved), describe quantitatively what happens to: the potential difference between the
The charged capacitor is connected to a 20 mH inductor. The resistance in the circuit is insignificant. At t = 1.2 ms find the magnetic energy in the inductor.
A ball is thrown upward from the ground with an initial speed of 25.8 m/s; at the same instant a ball is dropped from rest from a building 12 m high. After how long will the balls be at the same hei