How do we believe the Barringer crater formed?
What will be an ideal response?
A meteorite about 50 m in diameter impacted the surface.
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If a satellite moves with constant speed in a perfectly circular orbit around the earth, what is the direction of the acceleration of the satellite?
A) in the forward direction B) in the backward direction C) outward away from the earth D) inward toward the earth E) The acceleration is zero because the speed is constant.
Using graphical techniques estimate the temperature distribution through the earth around the electrical power line shown in Figure 2-62. Then estimate the heat transfer per unit length between the line and the ground surface.
A roadway is designed for traffic moving at a speed of 94 m/s. A curved section of the roadway is a circular arc of 740 m radius. The curved section is temporarily replaced with an unbanked roadway of the same radius
The coefficient of friction of this roadway is 0.40. The maximum safe driving speed for this unbanked, curved section is closest to: A) 54 m/s B) 52 m/s C) 50 m/s D) 48 m/s E) 46 m/s
Periods are divided into
a. eons. b. epochs. c. millennia. d. eras.