# Posts by Hanu2012

Total # Posts: 4

**Physics**

Brain buster: A laser sends red light of wavelength 650 nm from air into water in a swimming pool. The index of refraction of the water is 1.33. (a) What wavelength will the light have in the water? (b) What colour would light of this wavelength appear if it were in air? (c) ...

**Physics**

In a vacuum, which colour of light travels fastest red, blue, or green? Explain. Which colour travels fastest in a block of glass?

**Precalculus**

An 18 m tall tree is broken during a severe storm. The distance from the base of the trunk to the point where the tip touches the ground is 12 m. At what height did the tree break?

**Precalculus**

A fiel is in the shape of a right triangle. The fence around the perimeter of the field measures 40 m. If the length of the hypotenuse is 17 m, what will be the length of other two sides.