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What fraction of the power radiated by the sun is intercepted by the planet Neptune? The radius of Mercury is 2.48 107 m, and its mean distance from the sun is 4.50 1012 m. Assume that the sun radiates uniformly in all directions.
A gamma ray (a high-energy photon) can produce an electron (e?) and a positron (e+) of equal mass, What minimum gamma-ray energy is required to accomplish this task
A hydrogen atom is initially at n =3 state. find How much energy is required to ionize this atom
Tarzan swings on a 35.0-m-long vine initially inclined at an angle of 32.0° with the vertical. What is his speed at the bottom of the swing if he starts from rest
A particle of mass m is constrained to move between two concentric impermeable spheres of radii r = a and r = b (a
Two 2.3-cm-diameter electrodes with a 0.10-mm-thick sheet of Teflon between them are attached to a 9.0 battery. What is the charge before the Teflon is removed
A string of a violin is 32 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 7.2 x 10-4 kg/m. What are the wave speed and the tension in the string
Two sound waves have intensities of 0.100Wm^2 and 5.00W/^2. What is the difference in their intensity levels
Suppose 1.3 mol of an ideal gas is taken from a volume of 3.5 m3 to a volume of 1.8 m3 via an isothermal compression at 31°C
A 6.00 V storage battery is connected to three resistors, 7.00 ?, 15.0 ?, and 20.0 ?, respec- tively. The resistors are joined in series. What is the current in the circuit
Two long parallel wires carry currents of 3.85 A and 4.31 A. The magnitude of the force per unit lengh acting on each wire is 3.77 Ã- 10-5 N/m
A gas of hydrogen atoms is in the n = 2, l= 1 state. Find the spacing between the three degenerative levels of Ml
In a certain RL time constant circuit, it takes 135 msec for the current to reach maximum after the switch is closed.
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