Water is flowing through a pipe whose cross sectional area at point A is larger than the cross sectional area at point B. The reading on a pressure gauge connected to the pipe at point A will be lower than the reading on a pressure gauge connected to the pipe at point B
Indicate whether the statement is true or false
F
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Polarization: An ideal polarizer with its transmission axis rotated 30° to the vertical is placed in a beam of unpolarized light of intensity 10 W/m2. After passing through the polarizer, what is intensity of the beam?
A. 2.5 W/m2 B. 5.0 W/m2 C. 8.7 W/m2 D. 7.5 W/m2 E. 10 W/m2
Which of the following statements is an explanation, not an observation?
A) Stars can shine brightly for millions of years. B) Stars shine with energy generated by nuclear fusion in their cores. C) More distant galaxies are moving away from us faster than nearby galaxies. D) All planets orbit the Sun in the same direction and in nearly the same plane.
Which of the following would be the most capable ultraviolet telescope?
A) a 2.5 meter telescope, in space B) a 4 meter telescope, in space C) a 30 meter telescope, on a mountain D) a 10 meter telescope, on a mountain
Which factor below determines the steepness of a volcano?
A) how easily the lava flows B) the temperature of the lava C) the duration of the eruption D) the age of the volcano E) the volume of lava