Where would you go on earth to see a celestial pole at your zenith?
What will be an ideal response?
Answer: The North Pole or the South Pole (Latitude 90°, north or south).
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What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a beta particle (electron)?
a. Z increases by 1; A is unchanged. b. Z is unchanged; A is unchanged. c. Z decreases by 2; A decreases by 4. d. Z decreases by 1; A is unchanged.
Let's say that you are spinning a fixed-frequency buzzer attached to a string in a circular path around you at a constant speed. The frequency that you hear as you spin the buzzer sity?
1.is greater than the frequency of the buzzer and it is constant. 2.alternates between being greater than the frequency of the buzzer and less than the frequency of the buzzer. 3.is less than the frequency of the buzzer and it is constant. 4.is the same as the frequency of the buzzer.
Temperature differences between nighttime and daytime on Earth are relatively small due to
A) polar regions absorbing most solar energy. B) Earth being 70% water. C) Earth's relatively high daily spin rate and shortness of nighttime. D) seasonal fluctuations and Earths magnetic field.
Scientists try to form hypotheses that explain how nature works
a. True b. False Indicate whether the statement is true or false