Galileo's observations of the complete set of the phases of Venus proved that:
A) Venus orbited the Sun.
B) Venus orbited Earth.
C) Earth orbited Venus.
D) the Moon orbited Venus.
A
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While we may never be able to prove that our Moon really formed in a giant impact, which of the following would give scientists greater confidence that the model is correct?
a. Creating more sophisticated models of the giant impact that correctly predict many detailed characteristics of the Earth and Moon. b. Smashing together two glass marbles in a laboratory and then gluing the remnants together to make marbles that have the same size ratio as the Earth and Moon. c. Finding evidence that other giant impacts occurred in our solar system, with a total number of impacts consistent with what models of solar system formation lead us to expect. d. Observing evidence of recent giant impacts in other solar systems that are currently in the process of formation. e. Having the giant impact model endorsed by a dozen Nobel prize winners.
It sure is bright everywhere; you've been able to travel around a bit, and it's clear that you are not in a star. Yet it is as bright as looking directly at the Sun
In your extensive travels through your current surroundings, you cannot find a single neutral atom anywhere, nor can you find a nucleus besides hydrogen or helium. And, while it is hot (a few thousand degrees Kelvin), it is nowhere near the temperature needed for nuclear fusion. Where are you? A) You are in the universe during its first 300,000 years. B) You are in the universe more than 10100 years in the future. C) You are in an accretion disk around a supermassive black hole. D) You are in the central regions of a quasar. E) You are where the Sun should be located, but about 5 billion years from now.
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C After the 1 kg block of ice melts, the amount of heat required to raise its temperature to 10 °C is
a. 2,000 J b. 4,000 J c. 20,000 J d. 40,000 J e. 334,000 J
Earthquake waves are classified as P waves and S waves. Which of the following statements is true about these waves?
a. The P wave is transverse as is the S wave. b. The P wave is longitudinal as is the S wave. c. The P wave is transverse and the S wave is longitudinal. d. The P wave is longitudinal and the S wave is transverse. e. Both the P and S waves are mixtures of longitudinal and transverse waves.