A K0 particle at rest decays into a ?+ and a ??. What will be the speed of each of the pions? The mass of the K0 is 497.7 MeV/c2 and the mass of each ? is 139.6 MeV/c2


0.83 c

Physics & Space Science

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Impulse: Calculate the impulse due to a force of 4.5 N that lasts for 1.4 s.

A. 6.3 kg? m/s B. 5.0 kg? m/s C. 5.7 kg? m/s D. 6.9 kg? m/s

Physics & Space Science

We believe binary stars to be the ________ likely to have an extraterrestrial civilization

Fill in the blank(s) with correct word

Physics & Space Science

When de Broglie's matter waves are applied to electrons in the Bohr atom, which of the following occurs?

A. The electron is found to have in its orbit an integral number of half-wavelengths. B. Bohr's quantization assumption for electron orbits is modified to incorporate the wave properties of the electron. C. de Broglie's results allow an integral number of wavelengths in the electron orbits. D. The angular momentum of the electron in the atom is constant, with longer wavelengths at larger quantum numbers.

Physics & Space Science

Radiation pressure: The total electromagnetic power emitted by the sun is 3.8 × 1026 W. What is the radiation pressure it exerts on the perfectly absorbing surface of a satellite near the orbit of Mercury, which is 5.8 × 1010 m from the sun? The radiation strikes the surface of the satellite perpendicular to the surface. (c = 3.0 × 108 m/s)

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science