A proton charge travelling perpendicular to a magnetic field experience the same force as an alpha particle charge 2e which is also travelling perpendicular to the same field find the ratio of their speeds is v proton bi vi alpha

explanation:

the masses of the objects and the distance between them

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form