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Posts by dickson

Total # Posts: 10

physics
determine the center of mass for three particles(1.5, 2.5, 3.5) forming a equilateral triangle one side lenght of 135cm.

math
A triangle has a perimeter of 39 inches. If two sides are of equal length and the third side is 3 inches longer than either of the other two, how long is the longest side?

Physics
A man which travel due north in other to cross a river 5km wide flowing due east at 3km/h. If he can roll at 10km/h in still water. Find either by scale drawing or by calculation (1) the direction in which he must head is boat in order to get to his destination (2) the ...

PHYSICS
A ball is displaced from O to A along a straight line with a distance of 5.0m,it will later return to O along the same path.what is the resultant displacement and the total distance by the ball?

Maths
if Sin=(2theta-30degrees)= Cos=(3thetas+40degrees) then what is the value of the theta

Maths
in a class of 40 boys 18 passed business mathematics, 19 passed accounts, 10 passed economics, 6 passed accounts only, 5 passed business mathematics and accounts only, 2 passed accounts and economics only. how many passed in all three papers

Maths
In a class of 40 boys, 18 passed Business Mathematics, 19 passed Accounts, 10 passed Economics, 6 passed Accounts only, 5 passed Business Mathematics and Accounts only, 2 Passed Accounts and Economics only. How many passed in all three papers.

chemistry
charge carrier density here means how many electrons per cm^3 will go into conductivity band For temp1, 31C -> 304.2K 2.25*10^6 = exp( - 2.275*10^-19 / (1.381*10^-23 * 304.2)) For temp2, 175C -> 448.2K x = exp( - 2.275*10^-19 / (1.381*10^-23 * 448.2)) put this into ...

Maths
A hemispherical paper is folder into a hallow right circular cone. The radius of the hemispherical paper is 12cm. What's the cone's base radius, height and volume?

American History
Do you think the Social Gospel reformers and those who started settlement houses had realistic goals? Why or why not? Actually, I don't quite understand what it means by "realistic goals".Can anyone please explain? Thanks!

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