Chiếu 1 tia sáng từ không khí tới gặp mặt nước chiến suất N=1.33 tại I góc tới i. Xác định góc khúc xạ r trong 2 trường hợp sau a/ i=30 độ b/ i=60 độ

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

What are igneous intrusions and extrusions

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.