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A 12.0-kg block rests on a horizontal table and is attached to one end of a massless, horizontal spring. By pulling horizontally on the other end of the spring, someone causes the block to accelerate uniformly and reach a speed of 3.99 m/s in 1.02 s. In the process, the spring is stretched by 0.187 m. The block is then pulled at a constant speed of 3.99 m/s, during which time the spring is stretched by only 0.0763 m. Find (a) the spring constant of the spring and (b) the coefficient of kinetic friction between the block and the table.
The cosmic background radiation permeating the universe has the spectrum of a 2.7 K thermal radiator. What is the peak wavelength
A parallel-plate capacitor in air has a plate separation of 1.49 cm and a plate area of 25.0 cm2. Determine the change in energy of the capacitor
A wheel rotates without friction about a stationary horizontal axis at the center of the wheel. What is the moment of inertia of the wheel
question1two gerbils run in place with a linear speed of 0.60 on an exercise wheel that is twisted like a hoop. find
a wire of unknown material has a cross sectional area 5 mm^2 and length 12cm. The wire carries current density j = 3uC/s/m^2, what is the resistivity of the unknown material
Engineers can determine properties of a structure that is modeled as damped spring oscillator-such as a bridge-by applying a driving force to it, What is the oscillator\'s damping constant? (kg/s)
A bicycle racer is going downhill at 12.2m/s when, to his horror, one of his 2.42kg wheels comes off when he is 75.0m above the foot of the hill. How much total kinetic energy does the wheel have when it reaches the bottom of the hill
one ball of mass 575 g traveling 3.50 m/s to the right collides with another ball of mass 425 g that is intially at rest. what is the velocity of the heavier ball
If a wire has the dimensions 2 meter long and a radius of 1mm and the linear density of 10g/m, what is the mass of the wire
An LC circuit consists of a 20 mh inductor and a 0.5 if capacitor.maximum instantaneous current is 0.1 A
A 0.002 m^3 block of wood is fully submerged in water of density 1000kg/m^3 by a string with tension 10 N. Find the density of the wood
The minute hand of a wall clock measures14 cmfrom its tip to the axis about which it rotates. find angle from a quarter after the hour to half past
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