## Description

**Unit Vector Hat**

The unit vector hat has the symbols for the three main unit vectors, *î* (i-hat) *ĵ* (j-hat), and *k̂*, (k-hat). You could say that this is your i-hat, j-hat, and k-hat hat! Physics chic doesn’t get more geek!

The unit vectors are vectors with a length of one that point in a particular direction. *î* , *ĵ*, and *k̂ *form a set of three mutually perpendicular vectors. They are similar to *x*, *y*, and *z*, but a bit more generic. Most advanced physics courses use *i*, *j*, and *k* rather than *x*, *y*, and *z*.

A vector that has a length other than 1 that is pointing in the direction of one of the unit vectors can be expressed by simply multiplying the length times the unit vector. For example, a vector that is 5 m long pointing in the i direction would be 5 *î*.

To see how you can add a vector in the *î* direction to one in the *ĵ *direction, see this helpful info.

https://www.physicsthisweek.com/lessons/adding-perpendicular-vectors/

Wear your unit vector hat everywhere you go.

**Hat Description**

Dad hats aren’t just for dads. This one’s got a low profile with an adjustable strap and curved visor.

- 100% chino cotton twill
- Unstructured, 6-panel, low-profile
- 6 embroidered eyelets
- 3 ⅛” (7.6 cm) crown
- Adjustable strap with antique buckle
- Head circumference: 20 ½″–21 ⅝″ (50.8 cm–53.3 cm)
- Blank product sourced from Vietnam or Bangladesh

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