An electron of momentum 400 assuming no recoil, find the momentum transfer and its reduced de broglie wavelength. mev/c is scattered at an angle of 15 deg by a calcium nucleus also calculate the mott differential cross-section (point-like nucleus), and by what factor it is reduced if the calcium nucleus (a-40) can be assumed to be represented buy a model of a sphere with radius a 1.2 a fm (model i in fig. 3 of williams)

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Atorque acting on an object tends to produce a. equilibrium b. rotation c. linear motion d. velocity e. a center of gravity

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?