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sashaice [31]
3 years ago
13

Which of the following is not used for setting out right angles

Engineering
1 answer:
aliina [53]3 years ago
4 0
Optical squares are simple sighting instruments used to set out right angles. They can be provided either with mirrors or with one or two prisms. Because of practical difficulties in using squares with mirrors, they have been replaced by squares with prisms: "prismatic squares".
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Determine whether w is in the span of the given vectors v1; v2; : : : vn
Brrunno [24]

Determine whether w is in the span of the given vectors v1; v2; : : : vn

. If your answer is yes, write w as a linear combination of the vectors v1; v2; : : : vn and  enter the coefficients as entries of the matrix as instructed is given below

Explanation:

1.Vector to be in the span means means that it contain every element of said vector space it spans. So if a set of vectors A spans the vector space B, you can use linear combinations of the vectors in A to generate any vector in B because every vector in B is within the span of the vectors in A.

2.And thus v3 is in Span{v1, v2}. On the other hand, IF all solutions have c3 = 0, then for the same reason we may never write v3 as a sum of v1, v2 with weights. Thus, v3 is NOT in Span{v1, v2}.

3.In the theory of vector spaces, a set of vectors is said to be linearly dependent if at least one of the vectors in the set can be defined as a linear combination of the others; if no vector in the set can be written in this way, then the vectors are said to be linearly independent.

4.Given a set of vectors, you can determine if they are linearly independent by writing the vectors as the columns of the matrix A, and solving Ax = 0. If there are any non-zero solutions, then the vectors are linearly dependent. If the only solution is x = 0, then they are linearly independent.

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3 years ago
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Anton [14]

Answer:

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A gear box’s shaft is made of a hollow circular steel tube with allowable yield stress equal to σa????????o???? . The shaft is l
Leni [432]

Answer:

See explaination

Explanation:

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See attachment for the step by step solution.

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4 years ago
What amount of force is being exerted in the horizontal direction?
ZanzabumX [31]

Explanation:

Use trigonometry.  The horizontal force is:

Fₓ = F cos θ

Fₓ = 20 N cos 60°

Fₓ = 10 N

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i liked the vid

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