1 Place the cotton balls in areas where mice are likely to enter your house, by doorways or heat vents, etc. 2  Another helpful deterrent is to grow peppermint plants near the entryways. 3  You can use the mint in cooking as well as it serving a deterrent purpose.
Nov 12, 2015. 20 kilometers (12 miles) for a 1 milliwatt beam. Laser light can travel 20 kilometers (12 miles) per-milliwatt that is contained within the laser.
This post brings the scale of light-years down to the scale of miles and kilometers. The large yellow shell depicts a light-year; the smaller yellow shell depicts a light-month. A light beam takes 8 minutes to travel the 93 million miles (150 million km) from the sun to the Earth.