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.
It take approximately 5 seconds for a strong laser to hit the moon and return to earth.   __________________   It's less than that. The Moon's orbit averages 384,400 km â¦ from Earth, and the speed of light is 300,000 KM/sec.So the round-trip is closer to 2.4 seconds.oughly 2.5 seconds. Let's do the math: The average distance between the moon's surface and the earth's surface is 380,500 kilometers(km). Light is an electromagnetic wave an â¦ d travels at a speed roughly 3 x 10^8 meters/second(m/s) in a vacuum.