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"Dear radioactive ladies and gentlemen," is how physicist Wolfgang Pauli addressed a letter to his colleagues proposing the "desperate remedy" of adding a new, unobserved particle to the laws of nature. (Pauli was known as a stickler for grounding theoretical physics in experimental facts, which is why he considered his proposal of a particle no one had ever seen an act of desperation.) When Pauli penned this letter in 1930, he called this hypothetical particle the "neutron," although it was soon renamed the neutrino. Pauli's motivation for introducing the neutrino was to account for a discrepency in the measurements of a kind of radioactive decay called beta decay. His "desperate" prediction was borne out in 1956 when neutrinos were first observed directly.
Explain how Pauli was able to deduce the existence of the neutrino without it having been observed experimentally.
a positron q e moves at 4.88 x 107 ms in a magnetic field of magnitude 0.410 t. the magnetic force on the positron has
A transformer consists of two coils of wire wound on a common toroidal iron core. What is the induced emf in the second coil
a spaceship approaches an asteroid and sends out a radio signal with proper frequency 6.5 x 109 hz. the signal bounces
Two blocks connected by a rope of negligible mass are being dragged by a horizontal force. Suppose F = 65.0 N, m1 = 10.0 kg, m2 = 26.0 kg, evaluate the acceleration of the system
If the attempted merger should fail, the company stands to lose $2 million (due to loss of public goodwill) over the next 2 years with probability 0.5 and to lose $3 million over this period with probability 0.5. Should the merger be attempted? Ex..
a proton m 1.67 times 10-27 kg q e is sent from far away and impinge directly on a zirconium nucleus q 40e. the
a 86-mw vertically polarized laser beam passes through a polarizer whose polarizing angle is 25deg from the horizontal.
What is the significance of the negative sign in the equation E- = -∇ V ?
Find the angular velocity, in rad/s , of the earth due to its daily spin on its axis, the earth due to its yearly motion around the sun, and our moon due to its monthly motion around the earth
Male mosquitoes in the mood for mating find female mosquitoes of their own species by listening for the characteristic "buzzing" frequency of the female's wing beats. How many wing beats occur in one minute
Two long straight parallel current carrying wires pass through the x-axis. wire 1 passes through the origin and carries 1A out of the page. Wire 2 passes through x = 1m and carries current 3A into the page. Where can a third current carrying wire ..
A photon emitted as a hydrogen atom undergoes a transition from the n = 5 state to the n = 2 state. The energy of the ground state is 13.6 eV. Find the frequency of the emitted photon
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