Question

plz answer it fast thanks i will Mark it as brainliest but no rubbish should be there​

Answer 1

☑️Verified ANSWER:-

1- MASS IS A AMOUNT OF MATTER PRESENT IN THE OBJECT

2-ITS SI UNIT IS KGs

3-It is scalar quantity

4-its value doesn't change

5-mass value don"t change even we go to. Another planet

Answer 2

Unit vector is just a vector of length I

Unit vector in the direction of any vector can be calculated just by dividing the vector with its magnitude. Unit vector perpendicular to two given vectors can be found by dividing the cross product of two vectors with its magnitude.

Just as a note, you mean the value of “a”, not the value of “A.” A is given as a fixed vector.

Vectors that are perpendicular to one another have zero inner product:

A . B = 5*2 + 7*2 + 3*a = 0

Note that the last operator is + because both vectors have negative k components; the product of two negatives is a positive.

This is easy to solve:

10 + 14 + 3a = 0

3a = -24

a = -8