# 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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