Question

plzz answer these questions...​

Answer 1

Answer:1.Component of vector A in the direction of vector B

The vector projection of b onto a is the vector with this length that begins at the point A points in the same direction (or opposite direction if the scalar projection is negative) as a. This quantity is also called the component of b in the a direction (hence the notation comp).

2. The vector projection of b onto a is the vector with this length that begins at the point A points in the same direction (or opposite direction if the scalar projection is negative) as a. This quantity is also called the component of b in the a direction (hence the notation comp).

3.Vector, We have to find the component of vector a along the direction of vector b. So, the component of vector a =3 i+4 j along the direction of b =2 i - 3 j is -1.6.

4.Vector, We have to find the component of vector a along the direction of vector b. So, the component of vector a =3 i+4 j along the direction of b =2 i - 3 j is -1.6.

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Explanation:

Answer 2

❥Answer❥

❥Magnesium is a very reactive metal.

❥It reacts with atmospheric oxygen to form magnesium oxide.

❥The newly formed layer of magnesium oxide prevents or slows down the reaction.

❥So a sandpaper is used to remove the layer of magnesium oxide.

❥Thus it is advised that magnesium ribbon should be cleaned by rubbing with a sandpaper before the experiment.

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