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An LR Circuit consist of an inductor with L = 2.50*10^-4 H and a resistor with R = 1.10 ohm connected in series to an oscililating source of emf. This source generates a voltage emf = emfmax*(sin(wt)) with emfmax = .4 V and w = 8.00*10^4 rad/s. What is the maximum current in the circuit?
What is the phase angle of the current?
What is the average power dicipated in the resistor?
The blue ball moves at an angle of -35° and a velocity of 2.1 meters/second. What is the final y-momentum of the system?
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. (a) Find the average acceleration of the plane. m/s2 (b) Assuming the acceleration is constant, find the distance the plan..
An air traffic controller has two aircraft on radar. The first is at an altitude of 0.5 km, a horizontal distance of 3 km measured along the ground to the point directly underneath the plane, and a bearing of 115° west of north.
A 75-kg trqampoline artist jumps vertically upward from the top of a platform with a speed of 5.00 m/s. (a) how fast is he going as he lands on the trampoline 3.0m below? (b) If the trampoline behaves like a spring of spring constant 5.2 x 10^4 N/..
two small beads having positive charges 3q and q are fixed at the opposite ends of a horizontal, insulating rod, extending from the origin to the point x=d. a third small chatged bead is free to slide on the rod. at what position is the third bead..
A 25- sample of an ideal gas with is at 250 and 50. The gas is compressed isothermally to one-third of its original volume, then heated at constant volume until its state lies on the adiabatic curve that passes through its original state, and then al..
A 700 N car traveling at 25m/s.The breaks are applied suddenly and the car slides to a stop. The average breaking force between the tires and the road is 7100 N.How far will the car slide once the breaks are applied.
A ball is thrown upward from the ground with an initial speed of 23.90 m/s; at = same instant, a ball is dropped from a building 16 m high. After how long will the balls be at the same height.
A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2. What is its angular speed at the instant it goes through an angular displacement of 4.2 rad.
A dipole is formed by point charges +3.8 micro Coulomb and -3.8 micro Coulomb placed on the axis at (0.45 m, 0) and (-0.45m, 0), respectively. At what positions on the axis does the potential have the value 7.7×105 V?
A roller coaster goes 26 m along a section of track sloping 10 degrees below the horizontal, followed by a 15-m section sloping upward at 6 degrees, followed by an 18-m section of level track. Find the net displacement.
A professor's office door is 0.9 wide, 2.0 high, and 4 thick; has a mass of 25; and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame.
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