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A weight of unknown mass is suspended from a steel wire that is 1.27 m long and has a diameter of 0.56 mm; this causes the length of the wire to increase by 4 mm. Find the mass of the weight. (Give your answer with three significant figures, as usual.)
At t = 0 a grinding wheel has an angular velocity of 21.00 rad/s. It has a constant angular acceleration of 21 rad/s^2 until a circuit breaker trips at 2.40s. From then on it turns during 344 rad as it coasts to a stop at constant acceleration.
An object's true weight is 135N. When it is completely submerged in water, what is the density of the object
A transverse traveling wave on a cord is represented by D = 0.25 sin (6.8x + 28t), Determine maximum and minimum speeds of particles of the cord
Two large, non-conducting plates with the indicated area charge densities are suspended 3.67 cm apart, What volume of the air in region B (between the plates) stores an equal amount of energy
In an interstellar gas cloud at 48.2 K, the pressure is 1.16 x 10-8 Pa. what is their mean free path
A water pistol aimed horizontally projects a stream of water with an initial speed of 6.50 m/s. How far does the water drop in moving 1.90 m horizontally
A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.65 cm. The hose ends with a nozzle of diameter 2.50 cm. A rubber stopper is inserted into the nozzl..
An electric motor rotating a workshop grinding wheel at a rate of 93 rev/min is switched off. Assume the wheel has the constant negative angular acceleration of magnitude 2rad/s2.
A mass attached to a spring stretches it 2.5 cm from equilibrium. What is the angular frequency of the oscillation
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. Find the power consumed by the air filter.
A coil has an induced voltage of 120 volt when the rate of flux change is 0.4 Wb/s. How many turns are in the coil
What is the magnitude of the average force required to stop 1200kg car in 9.0 if the car is traveling at 65km/h
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