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Two blocks of masses 20 kilogram and 8 kilogram are connected together by a light string and rest on a frictionless level surface. Attached to the 8 kilogram mass is another light string, which a person uses to pull both blocks horizontally. If the two block system accelerates 0.5 m/s2, find the tension in the connecting string between two blocks?
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
Then, 25 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 12 m/s. For the cyclist in this 25 s interval, find out each of the following. (a) displacement (b) average velocity (c) average acceleration
A pion traveling at speed v decays into a muon and neutrino. at what angle does the muon come off
Two protons are moving directly toward one another, When they are very far apart, their initial speeds are 2.77 106 m/s. What is the distance of closest approach
a roller coaster reaches the top of the steepest hill with a speed of 5.3 kmh. it then descends the hill which is at an
A photon with wavelength 4 x 10^-15m converts to a muon/antimuon pair. The rest mass energy of the muon and the antimuon is 105.7 Mev. find the combined kinetic energy of the muon and antimuon
in a fourth of july celebration a firecracker is launched from ground level with an initial velocity of 28.6 at 39.1
A beam of light in air strikes the surface of a smooth piece of plastic having an index of refraction of 1.55 at an angle with the normal of 20°. The incident light has component E-field amplitudes parallel and perpendicular to the plane of incidence..
a 6.9nc charge is located 1.7m from a 3.8nc charge. find the magnitude of the electrostatic force that one charge
a particle of mass m0 is given a kinetic energy equal to one-fourth its rest-mass energy. how fast must the particle be
A building with a weight of 5.200e+7 N is built on a concrete foundation with an area of 1300 m2, By what vertical distance does the foundation compress
question a lightning bolt may carry a current of 1.00 x 104 a for a short period of time. what is the resulting
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