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A ladder of mass 30 kg and length 5m leans against a frictionless wall. The angle between the ladder and the wall is 37 degree.
(a) what is the force between the ladder and the wall?
(b) a 60 kg man now climbs up to the midpoint of the ladder, what is the force at the base of the ladder (magnitude and direction).?
(c) what must be the coefficient of friction so that the mass can climb all the way to the top of the ladder without slipping?
A proton is introduced at rest at a distance of 2 x 10^-14 from a bare nucleus of uranium, What is its kinetic energy in eV when it is expelled to infinity
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A dipole is formed by point charges +3.8 micro Coulomb and -3.8 micro Coulomb placed on the axis at (0.45 m, 0) and (-0.45m, 0), respectively. At what positions on the axis does the potential have the value 7.7×105 V? There should be an x1 and an ..
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530, what is the angle of refraction for each wavelength
An aircraft with a mass of 996 kg accelerates from 0 to 87 m/s in 6.2 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft when the aircraft launches
A +2.7 µC charge is 32 cm to the right of a -5.3 µC charge. At the midpoint between the two charges, determine the potential and the electric field
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 365 cal/g.
A water molecule can vibrate in various ways, but the easiest kind of vibration to excite is the "flexing" mode in which the hydrogen atoms move toward and away from each other by HO bonds do not stretch.
Explain how would your answer differ if the taxes payable method were used in accounting standards for private enterprises? Describe, do not calculate.
An aluminum wire having a cross-sectional area of 4.00 3 1026 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire
The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
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