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A cord is used to vertically lower an initially stationary block of mass M at a constant downward acceleration of g/4. When the block has fallen a distance d, find:
a) the work done by the cord's force on the block.
b) the work done by the gravitational force on the block.
c) the kinetic energy of the block. d) the speed of the block.
The time constant of an RC circuit is 2.6s. How much time (t) is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge?
Formulate a response that addresses whether or not you agree more guidance is needed and why; what you support and do not support about the proposal and why; and illustrate what modification you would make to the guidelines.
Gas is contained in an 6.4 L vessel at a temperature of 20°C and a pressure of 8.2 atm. Determine the number of moles of gas in the vessel
A helicopter is ascending vertically with the speed of 5.79. At a height of 127 above the Earth, a package is dropped from a window. How long take the package to hit the ground.
A 10 m platform diver during his diving can increase his rotation rate from an initial rate of 1.2 rev/s to a maximum of 3.1 rev/s. what is his moment of inertia at his maximum rotation rate
Tetchnetium is a radioactive isotope that emits a gamma ray with a half life of 6 hours. what fraction of the original dose remains in the body 24 hours after preparation
In radiofrequency (RF) ablation, a small needle is inserted into a cancerous tumor. When radiofrequency oscillating currents are sent into the needle, ions in the neighboring tissue respond by vibrating rapidly, causing local heating to temperatur..
The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer. If the number of divisions on the circular scale is 50, calculate the least count of the micrometer. U..
A 1 022-kg satellite orbits the Earth at a constant altitude of 91-km. What is the change in the system's kinetic energy
A 4.0-m-wide swimming pool is filled to the top. The bottom of the pool becomes completely shaded in the afternoon, How deep is the pool
An object, of mass m = 2 kg, is located between two massless springs on a frictionless incline of 30o . Initially the object is held at a position where the lower spring (k1= 950 N/m), Determine the maximum compression of the upper spring
A driver measures her "cold" tire gauge pressure to be 1.97 105 Pa. The measurement is made before driving, Find the final temperature of the air in the tires
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