Does a car undergo acceleration when it moves at constant speed in a straight-line direction? When it rounds a corner at constant speed? Explain
What will be an ideal response?
No, a car does not accelerate at constant speed in a straight line because its velocity doesn't change. But when it rounds a corner it is changing direction at every instant. This means a change in velocity, which by definition, means an acceleration. (Later we will learn that whenever a net force acts on something, that something accelerates in the direction of the net force. In the case of a car rounding a curve, the force that acts is friction on the tires.)
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The areas within the United States where humans have contributed the most sulfur to the atmosphere are generally near
A) nuclear power plants. B) coal-fired power plants. C) cement factories. D) hydroelectric plants.
Compare the tensions in former Soviet Republics of Central Asia since the end of the Soviet Union.
What will be an ideal response?
Which of the following is not a type of tectonic plate boundary?
A) divergent plate boundary B) fault plate boundary C) transform plate boundary D) convergent plate boundary
Glacial _______ can be used to determine relative time. Fill in the blank(s) with the appropriate word(s)