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A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.666. Find the smallest value for the angle ?, such that the lower end of the board does not slide along the ground.
Antenna A and Antenna B emit coherent radio waves. Antenna A is 125m due north of Antenna B. Constructive interference occurs 175m due east of antenna B. Determine the three longest possible wavelengths being emitted by the antennae.
A skier (m=55.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 6.90 m and D = 10.4 m, determine H.
A 61 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 11m , and falls a total of 32 m. Calculate the maximum acceleration she experiences
Starting from rest,a 10 cm diameter compact disk takes 3.0 s to reach its operating angular velocity of 2200 rpm. assume that the angular acceleration is constant.
A wire 6.10m long with diameter of 2.00mm has a resistance of 0.0280?. Find the resistivity of the material of the wire
A 10 kg mass is hung from a pulley that is shaped like a hoop. What is the acceleration of the 10 kg mass as it falls
White light is incident on a soap film (n = 1.29) in air. compute the minimum thickness of the soap film
How much work is done by the horizontal force F_p = 150 N on the 18 kg block of the figure when the force pushes the block 5.5 m up along the 32 degree frictionless incline
An object has a kinetic energy of 279 J and a momentum of magnitude 24.3 kg·m/s. Find the speed and the mass of the object
A tungsten wire has a radius of 0.082 mm and is heated from 20.0 to 1399 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1. How long is the wire
A block of mass 6 kg, which has an initial speed of 3 m/s at time t = 0, slides on a horizontal surface. obtain the magnitude of the acceleration of the block
A uniform electric field exists in the region between two oppositely charged plane parallel plates, find speed of electron when it strikes second plate
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