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Explain why the electrostatic interaction in ionic solids would (if alone) result in the collapse of the crystal to zero size and what it is that prevents this collapse in real crystal ?
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
a wire 50.0 cm long and under tension 400n is placed near a louderspeaker fed by an audio oscillator of variable
calculate the maximum height to which gasoline can be raised in such devices
A student attempts to "levitate" a piece of current-carrying wire using the Earth's magnetic field (55 T). Calculate the rate of heat production in the wire
q1. a 0.12-kg ball is placed in a shallow wedge with an opening angle of 120deg as shown in the figure. for each
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponent's head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in 0.018s
What is the speed of the two carts at the moment while their speeds are equal?
The "power cube" transformer for a portable CD player has an output of 4.5 V and 550 mA (both rms) when plugged into a 120 V/60 Hz outlet. What is the peak current in the primary coil
The Corvettte engine has a power output of 435hp. Its thermal efficiency is 27%. How much heat must be supplied to the engine per second
A transverse wave propagates in the positive x-axis with a wavelength of .3m and a period of .001s. What is the frequency and speed of this wave
At one point in space, the electric potential energy of a 10nC charge is 38?J. What is the electric potential at this point? If a was 20 nC charge were placed at this point and what would its electric potential energy be?
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
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