Aphoto frame weighing 4.16 newtons is hanging by a wire making an angle with the horizontal. the tension experienced by both wires is 3 newtons. what angle is made by both wires with the horizontal? a. 13.7º b. 24.3º c. 43.9º d. 45.4º e. 49.2º

Answer

Correct answer is C ( 43.9 degrees)

Explanation:

In this problem we have given

weight of photo frame=4.16N

Tension=3N

It is clear that  the photo frame is stationary, It means the wires will balance the force due to gravity (the weight).

It means the vertical components of the tension in the wires is equal the total weight.

Because the wires are symmetric, therefore weight of photo frame will be shared equally between wires.

It mean weight supported by each wire=4.16/2

=2.08 N

From figure it is clear that

sin(angle) = 2.08 / 3

angle = arcsin(2.08/3)

angle = 43.9 degrees

Hope this answer will help you

C=correct on PLATO

Explanation:

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it’s basically a motor working in reverse.

  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