The mass number of an atom is equal to the number of what particles in the nucleus?
A) protons
B) neutrons
C) nucleons
D) electrons
E) positrons.
C
Physics & Space Science
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What is the expected result from the merger of a large irregular and a small irregular galaxy?
What will be an ideal response?
Physics & Space Science
About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away. Use this information to estimate the average power output of the sun
A) 1 × 1026 W B) 2 × 1026 W C) 3 × 1026 W D) 4 × 1026 W
Physics & Space Science
Which of the following compounds contains both ionic and covalent bonds?
a. CaSO4 b. CHCl3 c. HNO3 d. C12H22O11
Physics & Space Science
Astronomical events, such as an asteroid impact or nearly supernova, have probably altered the course of evolution on Earth
Indicate whether the statement is true or false
Physics & Space Science