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A ladder is leaning against a wall by negligible friction. It is at an angle of 70 degrees to the horizontal, has a mass of 10kg and is 4 meters long. Its center of mass is 1/3 from the bottom end. What is the minimum coefficient of static friction to keep the ladder from sliding in this configuration? If a 75kg man climbs the ladder to the middle, will the ladder slip?
A certain conductor has 7.80*1028 free electrons per cubic meter, across-sectional area of 4.00 multiplied by 10-6 m2, and carries a current of3.50 A. Discover the drift speed of the electrons in the conductor
The Flip-Flap Railway in Coney Island, one of the first loop-the-loop roller coasters, had a loop of diameter 7.62 meters. Calculate the minimum height above the bottom of the loop required to achieve enough speed
A small block of mass 0.97 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R0 = 0.52 m with a speed 1.3 m/s. What is the final speed of the block
As a function of time t, force component Fx that acts on a 3.00 kg ice block that can move only along the x axis. At t=0, the block is moving in positive direction of the axis, with a speed of 3.0 m/s. what are its (a) speed and (b) direction of trav..
1.calculate the orbital radius of the hydrogen atom for the second principal quantum number.2.calculate the orbital
A mass of 1/4 slug is attached to a spring having a spring constant of 1 lb/ft. The mass is started in motion by initially displacing it 2ft. in the downward direction and giving it an initial velocity of 2 ft/sec in the upward direction. Find
Explain how far west has the sailboat traveled in 29 ? How far north has the sailboat traveled in 29?
Outline three examples of unusual properties of Nanostructured materials and Outline the density of states for 3D, 2D, 1D and 0D systems
What inductance must be connected to a 25 pF capacitor in the oscillator capable of generating 480 nm (i.e., visible) electromagnetic waves.
Suggest a proper answer with proof for if frequency of incident radiation is doubled, what will be the effect on maximum kinetic energy of photo electrons
Mercury flows through a horizontal pipe 1.05 cm in diameter and 1.3 m long. determine the rate of flow through the tube
A thin layer of magnesium fluoride (n = 1.38) is used to coat a flint-glass lens (n = 1.61). What atleast thickness should the magnesium fluoride film have if the reflection of 669 nm light is to be suppressed? suppose that the light is incident a..
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