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Derive a formula for the linear velocity of a planet v(r), where r is the distance from Sun (assume circular orbits). Apply your formula to Earth (r ' 150 *10^6 km). Compare v with the number which follows from the observed period of 1 year.
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Question: Pennies today are copper-covered zinc, but older pennies are 3.1 g of solid copper. What are the total positive charge and total negative charge in a solid copper penny that is electrically neutral?The density ...
Question: A projectile is fired from ground level at time t=0, atan angleθ with respect to the horizontal. It has an initialspeed v0 . In this problem we are assuming that the ground islevel. Part A Find the time tH it ...
After examining a cube-shaped object, explain, based on your observations, why Earth is not shaped like a cube? Describe 4 reasons with evidence to support each one.
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