Answer: (SL) Semilunar Valves
Explanation:
Answer:
Explanation:
it must be kept in place at least 10 hours after intercourse
Radio waves has the least energy
Answer:
The link doesn't work but it is known that when you add salt to ice, the ice not only melts but will actually get colder.
hope this at least helped you :>
Answer:
1 = A
2 = B
3 = B
Explanation:
1) Black holes occur when really big stars collapse on themselves. And, in order to get big, the star has to be an old one.
2) A black hole is something huge that swallows up everything, while a protostar is just the very beginning of a star.
3) Scientist can't truly know for sure, but they can infer about them due to the effects of the surrounding areas.
