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Q1. Three equal point charges, each with a charge of 1.90 mu C, are placed at the corners of an equilateral triangle whose sides have the length of 0.470 m. What is the potential energy of the system?
Q2. A solid, rectangular iron bar measures .40cm by 1.0cm by 30cm. Find the resistance between each of the three pairs of opposing faces, assume the faces in question are quipotentials.
Q3. A freight train has a mass of 1.7 × 10^7 kg. If the locomotive can exert a constant pull of 6.6 × 10^5 N, how long does it take to increase the speed of train from rest to 87 km/h?
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Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states. Find when the current in the solenoid increases to 5.0 A in a period of 0.90 s.
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A 18.0 kg loudspeaker is suspended 2.40m below the ceiling by two 4.10m long cables that angle outward at equal angles. What is the tension of each of the cables.
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A 73 trampoline artist jumps vertically upward from the top of a platform with a speed of 4.0. If the trampoline behaves like a spring of spring constant 6.2×104, how far does he depress it.
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A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that three different wave-lengths are observed while the hydrogen relaxes back to the ground state. What is the wavelength of the incident beam.
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