What is the magnitude of the resultant of two forces 20 Newton and 15 Newton at 90 degrees to each other

the magnitude of the resultant of two forces is 25 N.

Explanation:

Given;

first force, F₁ = 20 N

second force, F₂ = 15 N

the angle between the two forces, θ = 90⁰

The resultant of these two forces is obtained by applying Pythagoras theorem;

R² = F₁²  +  F²

Where;

R is the resultant force

R² = 20²  +  15²

R² = 625

R = √625

R = 25 N

Therefore, the magnitude of the resultant of two forces is 25 N.

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz