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Q. A person weighing 700N on a wire. Determine the tension force in the two segments of the wire. left wire 20 degrees and right wire 40 degrees.
Q. In a certain region, the earth's magnetic field has a magnitude of 4.80 10-5 T and is directed north at an angle of 62° below the horizontal. An electrically charged bullet is fired north and 11° above the horizontal, with a speed of 669 m/s. The magnetic force on the bullet is 2.90 10-10 N, directed due east. Determine the bullet's electric charge, including its algebraic sign (+ or -).
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The concepts for finding the change in length of a rod.
A 115 granite cube slides down a 35 frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 235 steel cube at rest.
What mass (in grams) of steam at 100 °C must be mixed with 287g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, an..
Megan's mass is 27 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 3.6 m/s at the bottom of the slide. How much work was completed by friction on Megan? Imagine that air resistance is negligible.
A student eats a candy bar that may give 1.8 * 10^6 joules of energy. if the student has a mass of 60 kg, how high will he have a climb a ladder to offset completely the energy contained in the candy bar.
Two charged bodies exert a force of .145N on each other. If they are now moved so they are one fourth as far apart, what force is exerted.
A 32.8 g piece of aluminium at 72 is dropped into a cavity in an extremely large block of ice at 0. How much ice mice does aluminium piece melt.
The yellow light from a helium discharge tube has a wavelength of 587.50. When this light illuminates a certain diffraction grating it produces a first-order principal maximum at an angle of 1.050.
A wire loop of radius 0.3 m lies so that an external magnetic field of magnitude 0.30T is perpendicular to the loop. The filed reverses its direction, and its magnitude changes to 0.20T in 1.5s. Find out the magnitude of the average induced emf in..
Sam, who's mass is 79 kg, takes off across level snow in his jet powered skis. The skis have a thrust of 204 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately the skis run out of fuel after only 13 s.
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