Remembering that each set of dots is separated by the same time interval, where on its elliptical path will the planet be traveling the fastest?
A planet will travel at its greatest speed when it is closest to the Sun where the dots
are farthest apart.
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The speed of a satellite orbiting Earth is given by v = ?(GM/d). Escape speed from Earth is given by v = ?(2GM/d), where in both cases G is the gravitational constant, M is Earth's mass, and d is distance from Earth's center
If a satellite's kinetic energy were doubled it could A) orbit at twice its distance from Earth. B) orbit at four times the distance from Earth. C) escape Earth.
What is the Great Red Spot?
A) a hurricane that comes and goes on Jupiter B) a long-lived, high-pressure storm on Jupiter C) a place where reddish particles from Io impact Jupiter's surface D) a region on Jupiter where the temperature is so high that the gas glows with red visible light
When a lump of uranium is broken into smaller pieces, the total surface area
A) decreases. B) remains the same. C) increases.
The lifetime of a ?+ meson normally is 18 nanoseconds. In a large particle accelerator, scientists can create ?+ mesons moving at speeds very close to the speed of light
What do the scientists observe when they measure the lifetime of a ?+ meson that is created at very high speed? A) The ?+ meson lasts 18 nanoseconds. B) The ?+ meson lasts much more than 18 nanoseconds. C) The ?+ meson lasts much less than 18 nanoseconds. D) The ?+ meson no longer decays and remains as a stable particle.