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Two equally charged insulating balls each weigh 0.42 g and hang from a common point by identical threads 40 cm long. The balls repel each other so that the separation between their centers is 6.2 cm. What is the magnitude of the charge on each ball?
A Hollow sphere of mass 6 kg and radius 1.2 meters is rolling without slipping on a horizontal surface with a velocity of 2 m/s. It collides perfectly elastically with a Solid sphere of mass 10 kg and radius .8 meters initially at rest. Find the vf a..
The force on a wire carrying 8.70A is a maximum of 1.25N when placed between the pole faces of a magnet. what is the approximate strength of the magnetic field
q1. what is an acceleration of two falling sky divers mass 120.0 kg including parachute while the upward force of air
The atmospheric pressure at sea level is about 1.0 multiplied by 105 Pa. What is the force at sea level that air exerts on the top of the typical office desk, 159cm long and 86 cm wide?
A rollercoaster with passengers has a mass of 2500 kg. This rollercoaster is powered to the top of a 25 m hill where it pauses for a moment at rest. What is the speed of the rollercoaster at the top of the vertical loop
A fishing line has attached to it a hollow plastic float 2.15 cm in diameter and having a mass of 1.90 g. Find the mass of a lead weight
Three equal point charges, each with charge 1.15 , are placed at the vertices of an equilateral triangle whose sides are of length 0.600 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
A parallel plate capacitor with 4.0 mm plate spacing has circular plates and holds a charge of +/- 6 uC on each plate when it is charged to a potential of 100 V. What is the radius of the plates
q. a 30 gram mass is hanging from a spring whose unstretched length is 20 cm and whose spring constant is 2.5 nm. in
Two people carry a 200-kg crate up stairs. The crate is1.25 m long and 0.50 m high, If the force each person applies is vertical, what is the magnitude of each of these forces
An electric resistor is energized until the temperature of the H20 reaches 150 C. Determine the magnitude of the electric work done on the H2O and the entropy change of the H2O.
When 16.8 J was added as heat to a particular ideal gas, the volume of the gas changed from 42 cm3 to 87 cm3 while the pressure remained constant at 1.3 atm. (a) By how much did the internal energy of the gas change
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