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What is the wavelength of a photon emitted from a hydrogen atom as an electron drops from the m=5 energy level to the n=2 energy level?
Rope BCA passes through a pulley at point C and supports a crate at point A. Rope segment CD supports the pulley, What is the angle required for equilibrium?
A point charge of 7.80 microColoumbs is located at the origin and second charge of -4.90nanoColoumbs is located on the x axis an x=3.25cm. Calculate the electric flux through a sphere centered at the origin with radius 1.30m
You measure a17 Volt potential difference across an 81 ohm resistor. Find what is the current flowing through it
An object with a mass of 84.0 g displaces 240.0 ml of water when it is completely immersed. What is the buoyant force on the mass
The E' is an unstable particle, with a mean lifetime on 2.5x10^-10s. What is the minimum uncertainty in this particles energy
A certain capacitor in a circuit has a capacitive reactance of 30.89 ohms when the frequency is 177 Hz. What capacitive reactance does the capacitor have
A solar collector is placed in direct sunlight where it absorbs energy at the rate of 910 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.79. What equilibrium temperature does the collector reach? Assume that ..
in an alcohol-in-glass thermometer the alcohol column has length 11.84 cm at 0.0 degrees c and length 22.87cm at 100.0
In a single-slit diffraction pattern on a flat screen, the central bright fringe is 1.6 cm wide when the slit width is 3.9 x10-5 m. When the slit is replaced with a second slit, the wavelength of the light and the distance to the screen remaining unc..
A sports car tire is 64 centimeter in diameter. The car is traveling at a speed of 30 m/s. Find the speed of a point at the bottom edge of the tire
A 64 kg skier starts from rest at height H = 16m above the end of a ski-jump ramp (Fig. 8-39). As the skier leaves the ramp, his velocity makes an angle of θ = 32° with the horizontal. Neglect the effects of air resistance and suppose the ramp is fri..
The speed of a bullet as it travels down the barrel of a gun isgiven by V=-5000t2 -300t, where v is in km/s and tin seconds. The acceleration of the bullet as it leaves the barrel is zero.
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