(Define second class lever with examples. Cloth cutting scissors have long edges whereas iron-cutting scissors
have short edges. Why?)
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electromagnetic waves travel through space with vacuums. give me brainliest if right.

b.a device that inputs heat into a cool object

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.