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Two identical 21.6-kg spheres of radius 14 cm are 29.8 cm apart (center-to-center distance).
(a) If they are released from rest and allowed to fall toward one another, what is their speed when they first make contact?
(b) If the spheres are initially at rest and just touching, how much energy is required to separate them to 1.02 m apart? Assume that the only force acting on each mass is the gravitational force due to the other mass.
The 1.20kg head of a hammer has a speed of 8.1m/s just before it strikes a nail and is brought to rest. Estimate the temperature rise of a 14gg iron nail generated by 5.0 such hammer blows done in quick succession
Find the speed of an orbiter in a circular orbit that is just above the surface of a planet, given that the orbiter's acceleration is equal to the planet's gravitational acceleration of 2.13 m/s2
A circular armature coil is used in a motor with a uniform magnetic field of 2.65 T, If this motor is operating on 120 VRMS now with a load (e.g running a fan) and at the angular frequency ?A, how much current is flowing throught the motor
A certain superconducting magnet in the form of a solenoid of length 0.30 m can produce a magnetic field of 13.0 T in its core when its coils carry a current of 105 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find o..
A woman on a bridge 81.0 m high sees a raft floating at a constant speed on the river below. Find the speed of the raft
A 7.28-%u03A9 resistor is connected across a 9.00-V battery. The voltage between the terminals of the battery is observed to be only 7.27 V. obtain the internal resistance of the battery
In an LC circuit, the amplitude of current oscillations is 2A and the amplitude of the voltage oscillation across the capacitor is 3V. If the capacitance is 5muF, what is the inductance?
A rural power line carries 1.7 A rms at 4700 V. A step down transformer reduces this to 235 V rms to supply a house. Find the turns ratio of the transformer
A circular wire loop of radius 14.1 cm carries a current of 2.51 A. What is the magnitude of the torque acting on the loop
Two wires, one of gold and the other of tungsten, are heated from 18 degrees C to the same final temperature. what is the percentage increase in the resistance of the tungsten wire
During a thunderstorm the electric field at a certain point in the earth's atmosphere is 1.11 105 N/C, directed upward, Find the acceleration of a small piece of ice of mass1.08 10-4 g
A certain organ pipe, open at both ends, produces a fundamental frequency of 256 in air.If the pipe is filled with helium at the same temperature, what fundamental frequency will it generate ? Take the molar mass of air to be 28.8 and the molar ma..
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