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The elementary particle called a muon is unstable and decays after 2.20 ?s, as observed in its rest frame, into an electron, a neutrino, and an antineutrino. What lifetime do you observe for the muon when it approaches you at 0.881 of the speed of light?
A 7 kg sled is initially at rest on a horizontal road. determine the change in the kinetic energy of the sled
A wire with mass 38.0g is stretched so that its ends are tied down at points a distance 78.0cmapart. What is the speed of propagation of transverse waves in the wire
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.06 × 106 m/s, Find the centripetal acceleration of the electron
A basketball can be modeled as a thin walled spherical shell with a mass of 0.600 kg and a radius of 12.0 cm. What is the rotational kinetic energy of the ball
A 100 W lightbulb produces 4.0 W of visible light. What is the light intensity on a wall 3.0 m away from the lightbulb
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 12-g nail
A 40.0 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at 0°C is 331 m/s. what is the frequency of the fundamental frequency
Most materials will expand when the temperature is increased. The change in size will depend on several factors, including the original size, What is the fractional change in length
Two C1 = 3.7 μF, C2 = 18.7 μF are charged individually to V1 = 14.2 V, V2 = 7.0 V. Calculate the final potential difference across the plates of the capacitors once they are connected
A circular coil 17.0cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this location has magnitude 5.50×10?5T, Determine the torque on the coil
A 3.60-{rm m}-long, 430 {rm kg} steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 {rm kg} construction worker stands at the far end of the beam. What is the magnitude..
Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV. What is the spontaneous emission wavelength
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