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A man pulls a suitcase from its handle, making an angle of 45 degress above the horizontale. While moving the suitcase horizontally over a distance of 40 m, 820 J of work are done by the man on the suitcase. Find the pulling force of the man. (cos45 = 0.7, sin45 = 0.7)
Unpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 40.1° with the axis of the polarizer. What fraction of the original light is absorbed by the analyzer
Two objects of masses 10.0 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley as in figure P4.20. The 5.00 kg object lies on a smooth incline of angle 40 degrees. Find out the acceleration of the 5.00 kg object ..
Vanguard 1, launched in 1958, is the oldest human artefact/satellite in orbit. It weighs 1.47 kg and orbits the Earth every 134.2 minutes. At its closest distance it is 654 km from the surface of the Earth. Assume that it is in a circular orbit an..
What is the difference in blood pressure (mm-Hg) between the top of the head and bottom of the feet of a 1.60-m-tall person standing vertically?
On a workday the average decibel level of a busy street is 78 dB, with 100 cars passing a given point every minute. what is the decibel level of the street
what must the charge sign and magnitude of a particle of mass 1.47 g. be for it to remain stationary when placed in a
Calculate the acceleration of an electron that moves through the same magnetic field as in the example, as the same velocity as the proton
The wiring in a house should be thick enough so it does not become so hot as to start a fire. What diameter should a copper wire be if it is to carry a maximum current of 32 A and produce no more than 1.4 W of heat per meter of length?
Calculate the canonical ensemble partition function for a collection of INDEPENDENT and NON-INTERACTING harmonic oscillators. Assume the energy spacing between adjacent states in an oscillator is LARGE compared to kT. Calculate in detail; do not s..
What power is supplied to the starter motor of a large truck that draws 260 A of current from a 22.5 V battery hookup
A single-turn wire loop is 3.6cm in diameter and carries a 620mA current. Find the magnetic field strength on the loop axis, 22cm from the center
calculate the energy content of 1 kg of natural uranium assuming complete fission. estimate an average energy per
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