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The wire is hung beween two towers and has a lenght of 143 cm.A cuurent of 111A exists in wire , and potential difference betweenends of wire is 0.432. Density of material is 7300 Kg/m3 andresistivity is 3.86*10-8 ohm. Find the mass of wire.
A wave of amplitude Ai and wave number ki is incident on the junction of two strings. If the wave number in the second string is kt = 2ki , find the amplitudes of the transmitted and reflected waves.
a plucked guitar string produces a sound wave of frequency 0.44 kHz on a day when the speed of sound is 340m/s. What is the wavelength of the sound wave
A cup of water is heated with a heating coil that delivers 117.85 W of heat. In one minute, the temperature of the water rises by 29.47 C. What is the mass in grams of the water
What is the wavelength of the third emission line?
A boat moves through the water with two forces acting on it. One is a 2149 N forward push by the motor on the propeller, What is the acceleration of the 1156 kg boat
A rescue helicopter is lifting a man (weight = 719 N) from a capsized boat by means of a cable and harness, What is the tension during the remainder of the rescue when he is pulled upward at a constant velocity
A block of mass 2.50 kg is pushed 2.60 m along a frictionless horizontal table by a constant 20.0 N force directed 25.0° below the horizontal. Determine the work done by the net force on the block
A diver makes 2.0 revolutions on the way from a 9.8-m-high platform to the water. Assuming zero initial vertical velocity, find the diver's average angular velocity during a dive
A kid is outside his home playing with a metal hoop and stick. If the hoop starts from rest at the top of the hill and reaches a linear speed of 9.50 m/s in 11.5 s, what is the angular acceleration of the hoop
A father racing his son has 2/3 the kinetic energy of the son who has 2/3 the mass of the father. What is the origianal speed of the father
question1a step-up transformer has 270 turns on its primary coil and 90000 turns on its secondary coil. the emf of the
A hand pump is being used to inflate a bicycle tire that has a gauge pressure of 36.9 psi. how far down must the piston be pushed before air will flow into the tire
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