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Two point charges Q1 = +4.10 nC and Q2 = ?2.60 nC are separated by 45.0 cm.
(a) What is the electric potential at a point midway between the charges? Answer by the unit of V
(b) What is the potential energy of the pair of charges? Answer by the unit of J
What is the energy in joules of an x-ray photon with wavelength 1.95 10-9 m, Convert the energy to electron volts
A proton moves through a magnetic field at 39.1% of the speed of light. obtain the magnitude of the magnetic force acting on the proton
Only about 5 % of the energy in the universe is composed of baryonic matter. Estimate the density of dark matter in the universe
Big yellow fishing swimming at 2.0m/s swallows little green fish at rest. What fraction of big yellow fish's initial kinetic energy was lost is this collision
Evaluate if the ball clears the crossbar, what is its height with respect to the crossbar when it reaches the plane of the crossbar?
Does the length of the Guy West Bridge ever change? Estimate the difference in the length of the footbridge between the hottest and coldest day of the year. estimate the length of the bridge
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image
An idealized voltmeter is connected across the terminals of a 12.5-{\rm V} battery, and a 73.5-\Omega appliance is also connected across its terminals. What is the internal resistance of the battery?
A 4.4 x 10^14 Hz laser emits a 2.1 mS pulse, 5.0 mm in diameter, Calculate the number of wavelengths in the length of the beam
A vector has components of 7.0 units along the x axis and 9.0 units along the y axis. What is the angle between the vector and the x axis
batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for .050 s, illustrate what is the impulse experienced by the ball.
A heat pump uses 100J of work output heat at some temperature. what is the coefficient of performance for the heat pump
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