Explain what causes high tides on Earth
What will be an ideal response?
The Moon is closest to the side facing it, so the pull is strongest there. The oceans on that side bulge towards the Moon. The Moon is a little further from the basically solid Earth, so it pulls more on that than on the oceans on the far side. The oceans on the far side are "left behind," creating a second bulge there.
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What is granulation in the Sun?
A) the bubbling pattern on the photosphere produced by the underlying convection B) another name for the way sunspots look on the surface of the Sun C) elements in the Sun other than hydrogen and helium D) dust particles in the Sun that haven't been turned into plasma E) lumps of denser material in the Sun
A spaceship leaves Earth and maintains a constant force by means of a nuclear engine. As the speed of the spaceship increases, an observer on Earth finds that relative to her the magnitude of the spaceship's acceleration is
A. 0. B. decreasing. C. constant. D. increasing. E. proportional to the kinetic energy of the spaceship.
Why are enzymes important to life?
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Why did Tycho conclude that the Sun revolves around the Earth?
A) He did not conclude that the Sun revolves around the Earth. B) He could not detect the parallax of stars expected if the Earth revolves around the Sun. C) He incorrectly measured the distance to the Sun and concluded it was in a low orbit around the Earth. D) Long-held tradition prevented him from even considering the idea.