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stepladder [879]
3 years ago
5

How did the exploration of the world in the 1500s contribute to the field of geography

Advanced Placement (AP)
1 answer:
Dmitriy789 [7]3 years ago
4 0
Well, if we had never explored there, we wouldn't have any information on that area at all.
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The outer ______ are the parts of an atom that are involved in chemical reactions.
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4 years ago
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Which of the following is the same as (V3+V2)2 ?
Drupady [299]
Solution. To check whether the vectors are linearly independent, we must answer the following question: if a linear combination of the vectors is the zero vector, is it necessarily true that all the coefficients are zeros?
Suppose that
x 1 ⃗v 1 + x 2 ⃗v 2 + x 3 ( ⃗v 1 + ⃗v 2 + ⃗v 3 ) = ⃗0
(a linear combination of the vectors is the zero vector). Is it necessarily true that x1 =x2 =x3 =0?
We have
x1⃗v1 + x2⃗v2 + x3(⃗v1 + ⃗v2 + ⃗v3) = x1⃗v1 + x2⃗v2 + x3⃗v1 + x3⃗v2 + x3⃗v3
=(x1 + x3)⃗v1 + (x2 + x3)⃗v2 + x3⃗v3 = ⃗0.
Since ⃗v1, ⃗v2, and ⃗v3 are linearly independent, we must have the coeffi-
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x1 + x3 = 0 x2 + x3 = 0 ,
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vectors ⃗v1, ⃗v2, and ⃗v1 + ⃗v2 + ⃗v3 are linearly independent.
Answer. The vectors ⃗v1, ⃗v2, and ⃗v1 + ⃗v2 + ⃗v3 are linearly independent.
4 0
3 years ago
How many moles of hydrogen are contained in 55.90 g of ammonium dichromate, (NH4)2Cr2O7?
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55.90 * 8 / 252.07 = 1.77 moles of hydrogen

6 0
2 years ago
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