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The block in the figure lies on a horizontal frictionless surface, and the spring constant is 48 N/m. Initially, the spring is at its relaxed length and the block is stationary at position x = 0. Then an applied force with a constant magnitude of 4.0 N pulls the block in the positive direction of the x axis, stretching the spring until the block stops.
When that stopping point is reached, what are
(a) the position of the block,
(b) the work that has been done on the block by the applied force, and
(c) the work that has been done on the block by the spring force? During the block's displacement, what are
(d) the block's position when its kinetic energy is maximum and
(e) the value of that maximum kinetic energy?
A newly designed electric train is to be driven by the force on a conducting axle due to the vertical component of Earth's magnetic field. At what rate would electrical energy be lost per ohm of resistance in the rails
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a car is traveling at 61.04 mph. the driver applies the brakes and the car decelerates at 1.97 ms2. what is the
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An aluminium cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. A 400 g sample of silver at an initial temperature of 90°C is placed in the water. The stirrer is utilized to stir the mixture gently until it reaches its final equilibr..
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Use Ampere’s law to determine the magnetic field in a densely wound toroidal solenoid with inner radius a, outer radius b, and N total turns. The cross section of the solenoid is a rectangle of width b-a and height h.
Compute the magnitude of the torque on the tree due to the tension in the rope, with the base of the tree acting as the reference point
Blood pressure is normally taken on the upper arm at the level of the heart. Assume, however, that a patient has his arms in a cast so you cannot take his blood pressure in the usual way.
A projectile is fired at an upword angle of 45.0 degrees from the top of a 265-m cliff with a speed of 185 m/s. What will be its speed when it strikesthe ground below
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