(a) what velocity must a helium atom (6.647 x 10^27 kg) have, to be diffracted by a film of silver atoms in which the spacing between atoms is 1.00 x 10-10 m?
(i) what is the wavelength requirement for radiation or an object (with resting mass) to undergo optimum diffraction around an (or between) object(s) ?
(ii) what relationship will you use to determine the velocity of helium traveling as a wave?
(b) electrons accelerated by a certain potential are diffracted by a thin film of gold. a beam of protons accelerated through the same potential are not diffracted by that same thin film of gold. briefly explain why this is so.

the higher the current the higher the mag field around it the higher the influence on the compass

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft