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An input force of 120 N is used to life an object weighing 240 N with a set of pulleys. What is the mechanical advantage of the pulley system?
A proton (mass = 1.67 x 10-27 kilogram, charge = 1.6 x 10-19 C) is accelerated from rest through a potential difference of 1000 Volt. Determine what velocity does it achieve
Two round concentric metal wires lie on a tabletop, one inside the other. The inner wire has a diameter of 18.0cm and carries a clockwise current of 14.0 A, as viewed from above, and the outer wire has a diameter of 38.0cm .
The images of astronomical and terrestrial telescopes are colored around the edges. Explain that. How can this "chromaticaberration" be avoided in practice?
A 50-g of ice cube at 0C is heated until 45g has become water at 100C and 5.0g has become steam at 100C. How much energy was needed to accomplish to transformation?
a bottle containing 6.6 kg mass of water at a temperature of 28.2 oc is placed in a refrigerator where the temperature
A 190 g sampleof a substance is heated to 324°C, What is the specific heat of the substance
A transparent sphere of unknown composition is observed to form an image of the Sun on the surface of the sphere opposite the Sun. Find the refractive index of the sphere material
In designing a machine part, you need a spring that is 8.45 cm long when no forces act on it and that will store 24.0 J of energy when it is compressed by 2.50 cm from its equilibrium position
An unstable particle at rest breaks up into two fragments ofunequal mass. what is the speed of the heavier fragment
Find the speed an alpha particle requires to come within 2.6 ? 10-14 m of a uranium nucleus
A 80 kg block is pulled at a constant speed of 8.3 m/s across a horizontal floor by an applied force of 120 N directed 37° above the horizontal. What is the rate at which the force does work on the block
Two sinusoidal waves of the same frequency travel in the same direction along a string. what is the amplitude (in cm) of the resultant wave
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