Dao động tổng hợp của ba dao động điều hòa cùng phương cùng tần số có phương trình li độ x = 4 cos( 10πt - π/2) (cm). Biết dao động thứ nhất và thứ hai có phương trình li độ lần lượt là x1 = 4cos( 10πt + π/6) (cm) và x2 = 4√3bcos( 10πt + 2π/3) (cm). Dao động thứ ba có phương trình li độ là?

it may be wrong but i think its a

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: