A violin string 20.0 cm long with mass 4.8 g and tension 48 N, fixed at both ends, oscillates in its n=2 mode. What is the wavelength in air of the sound emitted by this vibrating string? ( The speed of the sound in air is 343 m/s.)
The answer is 1.534 m, not sure how to find it.
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Explain the physics meaning of material buckling and geometry buckling.
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Errors are essential in physics Labs when measuring physical quantities. Discuss the most important techniques that we must follow in order to minimize such problems? Support your answer by example.
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The area enclosed by the wire loop in the figure below is reduced from 31 cm2 to 12 cm2 in a time interval of 0.11 s. The magnitude of the magnetic field is 0.53 T. Find the emf induced in the wire.
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Oxygen for hospital patients is kept in special tanks, where the oxygen has a pressure of 75.0 atm and a temperature of 280. K. The tanks are stored in a separate room, and the oxygen is pumped to the patient
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Suppose a rocket-propelled motorcycle is fired from rest horizontally across a canyon 1.20 km wide.
(a) What minimum constant acceleration in the
x-direction must be provided by the engines so the cycle
crosses safely if the opposite side is 0.780 km lower than the
starting point?
m/s2
(b) At what speed does the motorcycle land if it maintains this
constant horizontal component of acceleration? Neglect air drag,
but remember that gravity is still acting in the negative
y-direction.
m/s
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The ?? plane carries the surface free current density ?⃗⃗⃗ =?0?̂. The free current is centered within an infinite slab of linear material of permeability ?. The slab has a thickness 2 ? and is surrounded by free space. Find ?⃗⃗ , ?⃗⃗⃗ , ?⃗⃗⃗ , and the bound current densities everywhere. [Hint: For planar currents try always to draw a cross sectional view of the situation such that the current is out of the page]
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Write an essay on the use of electricity and magnetism in our future transportation with relevant references. Go into detail electricity magnetism 1500 words
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The star Phi Orionis, like the Sun, is powered by the fusion of hydrogen to helium. The mass of Phi Orionis is Mφ = 18M. The luminosity of Phi Orionis is Lφ = 20, 000L. Discuss the likelihood of intelligent life existing on a planet orbiting the star Phi Orionis. [Questions you might want to consider: What is the lifespan of Phi Orionis? How long did it take intelligent life to develop on Earth? How far would you have to be from Phi Orionis to receive the same flux of light that we receive here on Earth from the Sun?}
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2. If each of the following objects are rotating with the same angular velocity, ?, which would be the hardest to stop? (i.e., require the largest amount of work).
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3. If an object is in equilibrium, which of the following are true? There may be more than one correct answer.
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How does the Higgs mechanism causes the weak bosons to be massive?
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What is Local Gauge Invariance and why is it a cornerstone of the Standard Model?
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How SU (4) representation is calculated in Young's Tableaux?
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