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A spring has an unstretched length of 12cm. When an 80 g ball is hung from it, the length increases by 4.0 cm. Then the ball is pulled down another 4.0 cm and released.
a) What is the spring constant?
b) What is the period of the oscillation?
An infinitely long line of charge has linear charge density 4.00 10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 10-19 C) is 17.0 cm from the line and moving straight toward the line at 3000m/s.
A circuit with 2 capacitors, C1= 36.0 microF and C2=28.0microF, are hooked up in a series with each other, How much electric potential, V, is applied to the circuit
Two long, parallel wires, each having a mass per unit length of 40 g/m, are supported in a horizontal plane by strings 6.00cm long. When both wires carry the same current I.
Identify (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement measured from its starting direction.
At time a grinding wheel has an angular velocity of 21.0. It has a constant angular acceleration of 26.0 until a circuit breaker trips at time = 1.6. From then on, the wheel turns through an angle of 435 as it coasts to a stop at constant angular dec..
Starting from rest,a 10 cm diameter compact disk takes 3.0 s to reach its operating angular velocity of 2200 rpm. assume that the angular acceleration is constant.
A device uses a Stirling cycle on 391 moles of a monatomic ideal gas between two reservoirs with temperatures of 395 K, How much energy does this device remove from the cold reservoir
a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the boom and the horizontal is 48°.
An amount of ideal gas is con?ned to a sealed box at one-half atmospheric pressure, i.e., 50.65 kPa. With clever control, the volume of the box is reduced to 1/8 of its original value (without any gas leaking in or out), while the temperture is ke..
A block is given an initial velocity of 5 m/s up a frictionless 19° incline. How far up the incline does the block slide before coming (momentarily) to rest.
The magnitude of earth's magnetic field is 50.0 µT and makes an angle of 30° with the plane of the coil. Assume a patient takes 1.50 s to inhale, find the magnitude of average induced emf in the coil during that time.
In a simple atom, the electrons making transitions between outermost energy levels and the innermost energy levels give rise to photons with the reddest colours.
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