Which of the following is not one of the most common elements in living things?
a. oxygen
b. carbon
c. calcium
d. iron
e. nitrogen
Ans: d. iron
Physics & Space Science
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A beam of polarized light of intensity I0 passes through a sheet of ideal polarizing material. The polarization axis of the beam and the transmission axis of the sheet differ by 38°. What is the intensity of the emerging light?
a. 0.79I0 b. 0.62I0 c. 0.91I0 d. 0.90I0 e. 0.96I0
Physics & Space Science
The night sky is dark because the Universe is not infinitely old
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
What is the largest repository of fresh water?
What will be an ideal response?
Physics & Space Science
When energy is released in a chemical reaction, the reaction is called a(n) ______________ reaction
Fill in the blank(s) with correct word
Physics & Space Science