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A 380 kg piano slides 3.9 m down a 27 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Determine:
(a) the force exerted by the man,
(b) the work done by the man on the piano,
(c) the work done by the force of gravity, and
(d)the net work done on the piano.
A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a radius of 2.0 m
What inductance must be connected to a 25 pF capacitor in the oscillator capable of generating 480 nm (i.e., visible) electromagnetic waves.
A cylindrical capacitor has an inner conductor with a radius of 2.1mm and an outer conductor with a radius of 3.1mm. Find the charge (magnitude and sign) on both conductors
Consider a merry-go-round that has the form of a disc with radius 5.5 m and mass 130 kg. what is the total moment of inertia
A total charge of 7.05 10-6 C is distributed on two different small metal spheres. How much charge is on each sphere
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.03 Earth years in its circular orbit around its sun, Find the radius of the exoplanet's orbit in meters
A 77 person stands on the uniform ladder 4.0 long, that weighs 100. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only the normal force.
For a common emitter amplifer, current gain is 70. If the emitter current is 8.8mA, Calculate the collector and base current. Also calculate current gain
The equation of a transverse wave on a string is given by the formula below. Find the linear density of this string in grams per meter
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 until it stops. (a) How much time elapses from start to stop? (..
The fiscal year of cramer company ends on december 31. Explain how much interest expense will cramer company report in its december 31, 2011 income statement?
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