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One end of an iron poker is placed in a fire where the temperature is519°C, and the other end is kept at a temperature of 26°C. The poker is 1.2m long and has a radius of 5.0 multiplied by 10-3 m. Ignoring the heat lost along the length of the poker, discover the amount of heat conducted from one end of the poker to the other in 5.0 s.
q1. what is an acceleration of two falling sky divers mass 120.0 kg including parachute while the upward force of air
Three forces act on a moving object. One force has a magnitude of 86.7 N and is directed due north. Another has a magnitude of 59.9 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the obj..
What happens to the period of a mass-on-a-spring simple harmonic oscillator if the mass is doubled? What happens to the period if the spring constant is reduced by a factor of 3? How does the period depend on the amplitude of the oscillation?
A broken-down spaceship (Star Wreck?) flies across an international soccer field, How long does the spaceship pilot measure the field to be
An ideal fluid, with density of 0.85 ´103 kg/m3, flows at 7.0 m/s through a levelpipe with a radius of 0.50 cm. Find the speed of flow in the second pipe
question a 200 gram metal block absorbs 1500 joules of heat and its temperature changes by 150 degrees celsius. what is
A thin, uniform rod with negligible mass and length 0.200 m is attached to the floor by a frictionless hinge at point P. A horizontal spring with force constant k = 4.80 N/m connects the other end of the rod to a vertical wall.
A conductor of radius r, length l and resistivity ρ has resistance R. It is melted down and formed into a new conductor, too cylindrical, with one fourth the length of the unique conductor. The resistance of the new conductor is
q1. the coefficient of kinetic friction between a 78kg box and a warehouse floor is 0.21. how much force is necessary
A solid sphere of mass 0.524 kg rolls without slipping along a horizontal surface with a translational speed of 5.33 m/s. It comes to an incline that makes an angle of 31.7° with the horizontal surface. Ignoring energy losses due to friction, to what..
A 7.0 g bullet is fired into a 1.5 kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a max height of 12 cm. Find the initial speed of the bullet.
A man moves the 10-g object shown in a vertical plane from position X to position Y along a circular track of radius 20 m. The process takes 0.75 min. The workdone by the man is about:
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