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In Figure, we must apply a force of magnitude 80 N to hold the block stationary at x = - 2.0 cm. From that position, we then slowly move the block so that our force does + 4.0 J of work on the spring-block system; the block is then again stationary. What is the block's position?
A 0.548-kg ball is attached to one end of an aluminum wire that has a diameter of 1.44 mm and an unstretched length of 0.651 m. Calculate the increase in its length due to the tension
A cubical piece of heat-shield tile from the space shuttle measures 0.11 m on a side and has a thermal conductivity of 0.059 J/(s m ·C°). How much heat flows from the outer to the inner surface of the tile in six minutes
Hydrogen atoms in highly excited states with a quantum number as large as n=732 have been detected in interstellar space by radio astronomers. what is the orbital radius of the electron in such an atom? what is the energy of the electron?
A sphere of mass of m = 1.30 kg is first placed directly on the plate of an electronic scale. Calculate the density of the sphere
In outer space, a constant net force of magnitude 140N is exerted on a 30.4kg probe initially at rest. What acceleration does this force produce in m/s2
Propose a longitudinal study and a cross-sectional design being sure to identify the independent and dependent variables and discuss how you might be able to avoid the confounding that results from the presence of age in these quasi-experimental desi..
A 900kg car strikes a huge spring at a speed of 24m/s(Figure 1) , compressing the spring 5.5m. compute the spring stiffness constant of the spring
A hydrogen atom absorbs a photon with a wavelength l = 1094 nm. What is the atom's initial state
A 29 centimeter long solenoid 1.25 centimeter in diameter is to produce a field of 4.50 mT at its center. Determine how much current should the solenoid carry if it has 990 turns of the wire
The end of the cutting cord on a gas-powered weed cutter is 0.15 m in length. If the motor rotates at the rate of 20 rev/s, what is the tangential speed of the end of the cord
Find the angle (in radians) throuh which wheel rotates
Find the theoretical value for the acceleration for an object sliding down an incline plane. Ignore friction. Your answer should include a free-body-diagram as well as the sum-of-the forces equations.
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