1,000 milligrams = 1 gram
2,000 milligrams = 2 grams
3,000 milligrams = 3 grams
4,000 milligrams = 4 grams
As we know that speed of sound is

frequency of sound is

now we know that frequency of sound and speed of sound is related to each other by the following formula




<em>so wavelength of sound is 25 cm or 0.25 m</em>
Answer:
i don't know how to explain it but I think it's just the way you do it by yourself
A black hole is a place in space where gravity pulls so much that even light can not get out.