This problem concerns the electrically charged interstellar dust grain that was the subject of Problem 2.22. Its mass, which was not involved in that problem, may be taken as 10~13 gm. Suppose it is moving quite freely, with speed v<£c, in a plane perpendicular to the interstellar magnetic field which in that region has a strength of 3 X 10~6 gauss. How many years will it take to complete a circular orbit?

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west