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If transverse waves on a string travel with a velocity of 20 meter per second when the string is under a tension of 30 Newton, find what tension will be required for the waves to travel with a velocity of 40 m/s on the same string?
carmela and desi leave their physics classroom separately and travel west. they both start from rest.desi leaves first
a steel bar 10cm long is welded end to end with a copper bar 20cm long. each bar has the same cross sectional area on
If the density and atomic mass of copper are respectively 8.80 103 kg/m3 and 63.5 kg/kmol, Determine the drift speed of the electrons in a 10 gauge copper wire (2.588 mm in diameter) carrying a 19.5 A current
an electric field of intensity 3.7 knc is applied along the x-axis. calculate the electric flux through a rectangular
A motor (mass of 180kg) sits on a horizontal 2.25 m masslessplank. The motor is 1.00 m from one end of the plank. Find the supporting force applied at each end of the plank to keep thesystem in equilibrium
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
The negative terminals of three batteries (3V, 6V, 9V) are each connected to a 150 ohm resistor. what is the voltage across the gap in the broken wire
a vertical cylinder of cross-sectional area 0.06 m2 is fitted with a tight-fitting friction- less piston of mass 5.4
A metal strip 2.0 cm wide and 0.1 cm thick carries a current of 24 A in a uniform magnetic field of 2.4 T, as shown below. The Hall voltage is measured to be 4.27 V. Calculate the drift velocity of the electrons in the strip
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
A 92-kg skier is sliding down a ski slope that makes an angle of 30 degrees above the horizontal direction. what is the acceleration of the skier
A car is normally capable of an acceleration of 3m/s2. If it is towing a trailer with half as much mass asthe car itself, what acceleration can it achieve?
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