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A 23 meter long log of irregular cross section is lying horizontally, supported by a wall at one end and a cable attached 4.0 meter from the other end. The log weighs is 7.5 x 103 Newton, and the tension in the cable is 6.2 x 103 N. Find where is the log's center of gravity?
A boy throws a stone horizontally from the top of a cliff of height h toward the ocean below. find the speed of the stone immediately before it reaches the ocean
An unpolarized light beam of intensity I = 14.0 W/m2 is directed along the x-axis and enters a sequence of three polarizers at normal incidence. Calculate the intensity of the light leaving the last polarizer
a string of length 1.2m vibrates in 7 loops at a frequency of 70hz. show worka. what is the wavelength?b. at what
A car's outside rear-view mirror is convex, with focal length -1.2m. What is it's apparent height, and what is its apparent location
A rectangular block of irons of resistivity 9.68 x 10^8 ohms has dimensions 1.50 x 1.20 x 12.0 cm , What is the maximum resistance of the block
A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. How many times does the diaphragm move back and forth
An electron that is moving through a uniform magnetic field has a velocity v = (30 km/s)i + 18 km/s)j when it experiences a force F = (-4.000×10-15 N)i + (6.667×10-15 N)j due to the magnetic field. If Bx = 0, calculate the magnitude of the magnetic f..
Click on the Energy vs. Position button to see a plot of the kinetic, potential, thermal, and total energies as a function of the skater's position. Try Bar Graph to see the same information as a bar graph. For this tutorial, you should have the C..
A 23kg chimpanzee hangs from the end of a horizontal, broken branch of length L_0 = 1.6m, What is the shear modulus for this branch
A tourist takes a picture of a mountain 14 km away using a camera that has a lens with a focal length of 50 mm, What is the ratio of the height of the mountain's image on the camera's image
a telescope consists of a mirror with radius of curvature 4.5 m and an eyepiece. if an astronomer would like the
A horizontal pipe of diameter 120 mm has a constriction of diameter40 mm. The velocity of water in the pipe is 60 m/s and the pressureis 150 kPa. What is the pressure in the constriction
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