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How good of an investment do you think your contributions to FICA (Social Security taxes) are? Consider that you currently pay 6.2% of your gross salary up to $106,800 and your employer pays the same amount. (You pay an additional 1.45% on all earnings for Medicare, again, matched by your employer.) Thus, if you make $40,000 a total of $4960 goes into the Social Security Trust Fund.
Two equally charged insulating balls each weigh 0.44 g and hang from a common point by identical threads 40 cm long. The balls repel each other so that the separation among their centers is 6.4 cm. What is the magnitude of the charge on each ball?
A radio station broadcasts at a frequency of 92.0 MHz with a power output of 51.8 kW. what is the energy of each emitted photon
A fixed coil of wire with 10 turns and an area of 0.055 m^2 is placed in a perpendicular magnetic field. What is the average emf induced in the coil
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 335 K is heated at constant volume to 670 K, What is the net work done by the gas during the cycle
Calculate the force a piano tuner applies to stretch a steel piano wire 8.90 mm, if the wire is originally 0.850 mm in diameter and 1.35 m long
A bar-shaped piece of silicon at room temperature is one inch inlength and has a 100 μm2 cross-sectional area (i.e. 10x10μm). It is doped with phosphorous to a concentration of1017/cm3. Find the electrical current through the bar when avoltage of ..
An 1150-kg car pulls a 450-kg trailer. The car exerts a horizontal force of 3,800 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.15 for the trailer.
An electron microscope is using a 1.00 keV electron beam. An atom has a diameter of about 10-10 m. Find the wavelength of electrons in this microscope
Imagine I have electrons that populate two states in the normal manner at room temperature. I then somehow swap the populations (i.e. all the ones that were in the lower state go into the upper state, and vice versa). What is the new effective tem..
A 94.0kg spacewalking astronaut pushes off a 620kg satellite, exerting a 105N force for the 0.410s it takes him to straighten his arms.
How can you tell whether or not an atom is bounded(in a bound state) or unbounded based off a graph that should Energy vs Displacement(Xm)
A 23-g bullet traveling 230 m/s penetrates a 2.0-kg block ofwood and emerges cleanly at 170 m/s. how fast does it move after the bullet emerges
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