The hollow depression left when a shell or bone is dissolved completely out of a rock is called a(n)

a. groove.
b. hole.
c. cast.
d. mold.


d

Physics & Space Science

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A vertically polarized beam of light of intensity 100 W/m2 passes through two polarizers. The first polarizer is making an angle of 20° with its transmission axis and the second one is making an angle of 40° with its transmission axis

What is the transmitted intensity of this beam of light? A) 22.2 W/m2 B) 44.4 W/m2 C) 66.6 W/m2 D) 78.0 W/m2 E) 11.7 W/m2

Physics & Space Science

To divide two powers of ten:

a. multiply the exponents. b. divide the exponents. c. subtract the numbers and divide the exponents. d. divide the numbers and add the exponents. e. divide the numbers and subtract the exponents.

Physics & Space Science

Why are neutrinos so difficult to detect?

A) They have a tendency to pass through just about any material without any interactions. B) They are extremely rare. C) They have no mass. D) No one knows; this is the essence of the "solar neutrino problem."

Physics & Space Science

Describe how Eratosthenes measured the circumference of our planet

What will be an ideal response?

Physics & Space Science