Ba(NO₃)₂ + Na₂SO₄ → BaSO₄ + NaNO₃
By Trial and error.
Ba(NO₃)₂ + Na₂SO₄ → BaSO₄ + 2NaNO₃
Check:
LHS RHS
Ba 1 1
N 2 2
S 1 1
O 3*2 + 4 = 10 4 + 2*3 = 10
I'm not sure, but I'm pretty sure it depends.
72 Km/hr
= 72000 m/ 60×60 s
= 72000 m/ 3600 s
= 20 m/s
Answer is 20 m/s.
Hope it helps! Please do comment
<h3><u>Answer</u> :</h3>
First of all, See the attachment for better understanding
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❂ <u>Weight of block A</u> :
➝ mg sin30° = 18
➝ W (1/2) = 18
➝ W = 18×2
➝ <u>W = 36N </u>
❂ <u>Weight of block B</u> :
➝ N sin30° = 18
➝ (Mg cos30°) sin30° = 18
➝ W' (√3/2)(1/2) = 18
➝ W' (√3/4) = 18
➝ W' = 72/√3
➝ <u>W' = 41.61N</u>