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Four point charges of magnitude 4.7 µC are at the corners of a square of side 3 m. (a) Find the electrostatic potential energy if all the charges are negative. (b) Find the electrostatic potential energy if three of the charges are positive and one is negative
Determine the temperature at which the resistance of atungstenwire will be three timesits value at 20°C. Assume its coefficient of resistivity remains constant.
A second package is throw downward from the plane with a vertical speed V1=58 m/s. find the horizontal distance traveled by this package
The arm in the figure below weighs 43.7 N. The force of gravity acting on the arm acts through point A. Determine the magnitude of the tension force Ft in the deltoid muscle
A 3.0-uC point charge is placed in an external uniform electric fieldof 1.6 x 104 N/C. At what distance from the charge is the net electric field zero
Discuss the position and size for the n = 1 state of Harmonic Oscillator. How do you picture this state? What is her size relative to the well wall? Does she penetrate the wall much?
the temperature of the air in a resonator is 15degc when a tuning fork vibrates at one end the spacing between tow
A parallel plate capacitor of capacitance 7.6 µF has the space between the plates filled with a slab of glass with ? = 3.2. Find the charge on the plates after the glass is removed
Two capacitors, one that has a capacitance of 3.90 µF and one that has a capacitance of 12.3 µF, are connected in parallel. Find the potential difference across each capacitor after they are reconnected
A beam of thermal neutrons emerges from a nuclear reactor and is incident on a crystal. Find the Bragg- scattering angle that results in a scattered beam of this energy
A 2 kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 4.60sin (2pi*t), where F is in newtons and t is in seconds. The force constant of the spring is 20.0 N/m.
Two cars of 2000 kg each collide head-on while traveling at 75.0 miles per hour. What is the temperature increase of the cars
A Doppler ultrasound machine uses a probe emitting ultrasound waves at 5MHz to probe the speed of blood cells moving in an artery, What is the wavelength through the soft tissue of ultrasound produced by this machine
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