The motion of a piston in an auto engine is simple harmonic. If the piston travels back and forth over a distance of 10 cm, and the piston has a mass of 1.5 kg, what is the maximum speed of the piston and the maximum force acting on the piston when the engine is running at 4 200 rpm?
22 m/s, 14 500 N
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A 25-kg piece of equipment can be hung by steel wires of length 1.00 m, 2.00 m, or 3.00 m. If all the wires have the same diameter, which one will stretch the greatest distance?
A) the 1.00-m wire B) the 3.00-m wire C) the 2.00-m wire D) They will all stretch by the same distance.
If the mass of the Sun were cut in half, how would the force between the Sun and the Earth change?
a) it would quadruple b) it would double c) it would remain unchanged d) it would decrease by a factor of four e) it would decrease by a factor of two
Electron flow is in the direction of conventional current
Indicate whether the statement is true or false
An electron is confined in a harmonic oscillator potential well. A photon is emitted when the electron undergoes a 3?1 quantum jump
What is the wavelength of the emission if the net force on the electron behaves as though it has a spring constant of 9.6 N/m? (mel = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 290 nm B) 150 nm C) 190 nm D) 580 nm