A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets.
What will be an ideal response?
Answer: They hit at the same time
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What is the Sun made up of?
a. rock b. metal c. ice d. hot gas e. water
In another solar system, a planet has a moon that is 4.0 × 105 m in diameter. Measurements reveal that this moon takes 3.0 x 105 s to make each orbit of diameter 1.8 × 108 m. What is the mass of the planet? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 3.4 × 1024 kg B) 4.8 × 1024 kg C) 1.2 × 1024 kg D) 1.7 × 1024 kg E) 2.4 × 1024 kg
Shell Radius: Using the Bohr model, what is the radius of the lowest-energy electron orbit in a singly-ionized He atom, which has 2 protons? (r1 = 0.0529 nm for hydrogen)
Fill in the blank(s) with the appropriate word(s).
Based on current scientific evidence, the theory that has been most successful at explaining the origin of life on Earth is
A) naturism B) panspermia C) intelligent design D) chemical evolution