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What change in magnetizing force is required to decrease the flux density of magnetic material from a saturation in the positive direction to zero.
A heated copper wire 1 mm in diameter is in a pool of water at 1 atm. What is the maximum heat flux (q/A)? The temperature difference is related to the heat
A light horizontal spring has a force constant of k=100 N/m. A 2.00 kg block is pressed against one end of the spring, compressing it 0.100 m.
A string is wrapped several times around the rim of a small hoop with radius and mass . The free end of the string is held in place and the hoop is released.
When operating from a 230 V dc supply, a DC series motor operates at 900 rounds per minute with a line current of 75 Amps. Its armature-circuit resistance
The case starts from rest at the bottom and is moving 4.02 m/s at the top of the incline. The force of friction on the box is 39.4 N.
Consider a point source emitting 10^12 neutrons/s in a vacuum. Calculate the flux and the current at a distance of 1 m from the source
What is the net upward force on an airplane wing of area 17.9 m^2 if the speed of air flow is 295 m/s across the top of the wing and 280 m/s across the bottom.
Consider the space region bounded below by the right angled cone z=sqrt(x^2+y^2), and above by the sphere
Determine the energy required to accelerate an electron between each of the following speeds.
Find the current I_N, required to establish a flux of 2 mWb in the air gap of the magnetic structure shown in the figureThe structure is made of silicon
From the conditions in part (b), derive a transcendental equation determining the bound state energy E.
According to its package, a 100 watt light bulb emits 1140 lumens. For simplicity, assume the bulb provides isotropic illumination.
The container can be modeled as a perfect cylinder with a radius of 9 inches and no end caps.The height of the bed of the pickup truck is H=20 inches.
A block slides on a semicircular frictionless track. If it starts from rest at position (A), What is its speed at the point marked.
A child playing marbles shoots a marble directly at another marble at rest. The first marble stops, and the second marble continues in a straight line.
A perfectly insulated container contains 70 g of water and has a small heater immersed in water. The temperature of the water is 40 degrees Celsius.
Consider a body of flowing water, such as a river. We can describe the flow of river water mathematically by a vector field that describes the water velocity
Explain the answers to a and b above in terms of the energy changes that occur during the flight of the stone from A to C.
Consider a generator constructed as shown in the attachment. The loop in this generator rotates at an angular rate of w
The region between the conductors is air. Ke =1/4*pi*epsilon= 8.98755e9 N m^2/C^2.
The core illustrated is 1 cm thick. All legs are 1 cm wide, except for the right-hand side vertical leg, which is 0.5cm wide.
Calculate the energy of the neutron emitted in the forward direction by a beam of 150 keV deuterons undergoing the D-T (deuterium-tritium).
Argue that the critical temperature of the phase transition to the Bose condensed state is given by kTc = h? ³v(N/?(3))
The block is released a height h = 3.91 m above the bottom of the loop.What is the force of the inclined track on the block at the bottom (point A)?