Find the volume of the parallelepiped with adjacent edges PQ, PR, and PS. P(-2, 1, 0), Q(2, 3, 2), R(1, 4, -1), S(3, 6, 1)

boitshupoO

boitshupoO

Answered question

2021-05-08

Find the volume of the parallelepiped with adjacent edges PQ, PR, and PS.
P(-2, 1, 0), Q(2, 3, 2), R(1, 4, -1), S(3, 6, 1)

Answer & Explanation

pierretteA

pierretteA

Skilled2021-05-09Added 102 answers

Any three vectors (a=,b=) and (c=,) we can find the volume of the parallelogram that the three vectors are shaping, using the triple product of these three vectors a(b×c)
Volume=[a(b×c)] (1)
[a(b×c)]=|a1a2a3b1b2b3c1c2c3|
The value  of the determined can be computed,
|a1a2a3b1b2b3c1c2c3|=a1|b2b3c2c3|a2|b1b3c1c3|+a3|b1b2c1c2|
=a1((b2c3)(b3c2))a2((b1c3)(b3c1))+a3((b1c2)(b2c1))
Or the value of the determinant can be found using Sarrus's rule 3×3 determinant "This work for 3×3 determinant Only", where by duplicating the first two columuns of the matrix after the third columns, a 3×5 determinant is formed as follows
|a1a2a3b1b2b3c1c2c3||a1a2b1b2c1c2|
The value of the determinant is thus determined by Sarrus's rule to be the product of all the South-East diagonals minus the product of all the South-West diagonals, so that
=((a1b2c3)+(a2b3c1)+(a3b1c2))((a2b1c3)+(a1b3c2)+(a3b2c1))
In order to get the magnitude for the triple product, which would reflect the parallelogram's volume, we start by determining the value of the triple product, also known as "the value of the determinant."
PQ=QP=2+2,31,20=4,2,2
PS=SP=3+2,61,10=5,5,1
PR=RP=1+2,41,10=3,3,1
PS(PQ×PR)=|551422331|
=|55

nick1337

nick1337

Expert2023-05-27Added 777 answers

The scalar triple product is defined as follows:
PQ·(PR×PS)
where · denotes the dot product and × denotes the cross product.
First, let's find the vectors PQ, PR, and PS.
PQ=[2(2)3120]=[422]
PR=[1(2)4110]=[331]
PS=[3(2)6110]=[551]
Next, let's calculate the cross product PR×PS.
PR×PS=[331]×[551]
Using the cross product formula, we can compute the components of the resulting vector:
[331]×[551]=[(3×1)(3×5)(3×5)(3×1)(3×5)(3×5)]=[12120]
Now, we can calculate the dot product of PQ and PR×PS.
PQ·(PR×PS)=[422]·[12120]
Using the dot product formula, we have:
[422]·[12120]=(4×12)+(2×12)+(2×0)=48+24+0=24
Therefore, the volume of the parallelepiped with adjacent edges PQ, PR, and PS is |24|=24 cubic units.
Vasquez

Vasquez

Expert2023-05-27Added 669 answers

To find the volume of a parallelepiped with adjacent edges PQ, PR, and PS, we can use the scalar triple product. The scalar triple product of three vectors is defined as follows:
𝐕=PQ·(PR×PS)
where · denotes the dot product and × denotes the cross product.
First, let's find the vectors PQ, PR, and PS. The vector PQ is given by:
PQ=𝐐𝐏=(2,3,2)(2,1,0)=(4,2,2)
Similarly, we can find the vectors PR and PS:
PR=𝐑𝐏=(1,4,1)(2,1,0)=(3,3,1)
PS=𝐒𝐏=(3,6,1)(2,1,0)=(5,5,1)
Next, we can calculate the cross product of PR and PS:
PR×PS=|𝐢𝐣𝐤331551|
Expanding the determinant, we get:
PR×PS=(3·1(1)·5)𝐢(3·1(1)·5)𝐣+(3·55·5)𝐤=8𝐢8𝐣10𝐤=(8,8,10)
Now, we can calculate the dot product of PQ and (PR×PS):
PQ·(PR×PS)=(4,2,2)·(8,8,10)=4·8+2·(8)+2·(10)=321620=4
Finally, we take the absolute value of the scalar triple product to get the volume of the parallelepiped:
Volume=|𝐕|=|4|=4
Therefore, the volume of the parallelepiped with adjacent edges PQ, PR, and PS is 4.
RizerMix

RizerMix

Expert2023-05-27Added 656 answers

Result:
72 cubic units
Solution:
|PQ·(PR×PS)|
where PQ is the vector from point P to Q, and PR×PS is the cross product of vectors PR and PS. Let's calculate each component step by step.
First, let's find the vector PQ:
PQ=[2(2)3120]=[422]
Next, let's calculate the cross product PR×PS:
PR×PS=[1(2)4110]×[3(2)6110]=[331]×[551]=[(3×1)(3×5)(3×1)(3×5)(3×5)(3×5)]=[12120]
Now, let's calculate the scalar triple product:
|PQ·(PR×PS)|=|[422]·[12120]|=|(4×12)+(2×12)+(2×0)|=|4824+0|=|72|=72
Therefore, the volume of the parallelepiped is 72 cubic units.

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