2 years ago

Heat travels from cold to hot. O True O False

Mathematics

1 answer:

Lady bird [3.3K]2 years ago

7 0

Answer:

False

Take water heating up for example. Heat travels just from...heat!

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2 years ago

A square matrix A is said to be idempotent iff A2 = A. (i) Show that if A is idempotent, then so is I − A. (ii) Show that if A i

muminat

Answer:

Step-by-step explanation:

Given that A is a square matrix and A is idempotent

$A^2 = A$

Consider I-A

i) $(I-A)^2 = (I-A).(I-A)\\= I^2 -2A.I+A^2\\= I-2A+A\\=I-A$

It follows that I-A is also idempotent

ii) Consider the matrix 2A-I

$(2A-I).(2A-I)=\\4A^2-4AI+I^2\\= 4A-4A+I\\=I$

So it follows that 2A-I matrix is its own inverse.

7 0

2 years ago

Heat travels from cold to hot. O True O False​

Heat travels from cold to hot. O True O False